Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1980-03-10
1982-08-10
Eickholt, E. H.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
E02F 928
Patent
active
043431003
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates generally to a pivotally mounted, load bearing floor, such as the floor of an earthworking scraper, and more particularly to a floor support.
BACKGROUND ART
Mobile, earthworking scrapers usually include a scraper bowl having a bottom opening and a pivotal floor which opens and closes the bottom opening. A pivoting apparatus is provided which includes a pivotal mounting structure supporting the floor on the bowl and an actuator for pivoting the floor rearwardly to an open, or load discharging, position and forwardly to a closed, or loading, position. Typically, the actuator includes one or more fluid cylinders. For example, U.S. Pat. No. 3,328,903, inventors Trevor G. Campbell, et. al., issued July 4, 1967, discloses an earthworking scraper having a floor which is pivoted by means of a lever moved by a fluid cylinder.
During loading, the floor is closed and earth is loaded into the bowl, as by an auger mechanism on the scraper, so that the weight of earth imposes primarily vertical forces on the floor. In load discharge, when the floor is pivoted to an open position, vertical forces on the floor continue to be imposed by the weight of the earth remaining in the bowl. In addition, as the scraper moves over the discharged earth and a striking edge of the floor levels the discharged earth, substantial horizontally-directed forces are imposed on the floor's striking edge.
These forces place considerable stress, not only upon the floors thereof, but also upon the pivoting apparatus. Hitherto, such stresses have caused components of the pivoting apparatus to bend or twist, resulting in an undesirable reduction in life thereof.
DISCLOSURE OF THE INVENTION
The present invention is directed to overcoming one or more of the problems as set forth above.
In one aspect of the present invention, an improved floor support is provided on a scraper having a frame, a bowl mounted thereon, and a pivotally mounted floor which is movable between an open and closed positions relative to a bottom opening of the bowl. The improved floor support comprises support means for supporting the floor from underneath and by the frame to reduce loading on a pivoting apparatus.
According, the above floor support extends the useful life of the pivoting apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects of this invention will become apparent from the following description and accompanying drawings wherein:
FIG. 1 is a diagramatic side elevational view of a mobile scraper including an improved floor support embodiment of the present invention;
FIG. 2 is a diagramatic side elevational view, partially broken away and enlarged, of a detail of FIG. 1;
FIG. 3 is a diagramatic side elevational view similar to that of FIG. 2, but with a floor of the mobile scraper having been pivoted; and,
FIG. 4 is a diagramatic cross-sectional view taken along line IV--IV of FIG. 3.
BEST MODE OF CARRYING OUT THE INVENTION
FIG. 1 illustrates a scraper 10 comprising a tractor 12 having a gooseneck 14 extending rearwardly therefrom. A transversely disposed draft tube 16 is secured to gooseneck 14 and has a pair of draft arms 18 (only one being herein illustrated) connected thereto. Rearward end portions 22 of each draft arm 18 are pivotally connected to a respective one of a pair of upstanding sidewalls 24 of a scraper bowl 26. Scraper bowl 26 generally defines a rearward portion 28 and a forward portion 29 and has a bottom opening 30. A pair of gussets 31 are affixed to sidewalls 24 at rearward portion 28. Sidewalls 24 are opposed from each other in a generally parallel relationship and are rigidly mounted on a pair of frame rails 32 at generally rearward portion 28.
Turning to FIG. 4, it may be seen that a pair of rigid box sections 33 connect gussets 31 to frame rails 32. Frame rails 32 are tied to each other by a medial box section 34 which spans between frame rails 32. Frame rails 32 horizontally terminate adjacent bottom opening 30 at frame ends 35, and vertically define a lowermost portion 36 thereof ad
REFERENCES:
patent: 2169612 (1939-08-01), McMillan
patent: 2272221 (1942-02-01), Mork
patent: 2368196 (1945-01-01), Brodersen
patent: 3328903 (1967-07-01), Campbell et al.
patent: 3426457 (1969-02-01), Hancock et al.
patent: 3452458 (1969-07-01), Campbell et al.
patent: 3872612 (1975-03-01), Gee
patent: 4041625 (1977-08-01), Fisher et al.
patent: 4133122 (1979-01-01), Girard et al.
Caterpillar Tractor Co.
Eickholt E. H.
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