Motor grader blade lift and control mechanism and method

Earth working – Processes

Patent

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Details

172791, 172797, E02F 376

Patent

active

040530167

ABSTRACT:
A motor grader comprises a frame having a circle drawbar mounted thereunder. A normally horizontally disposed mold board or blade is attached to the circle drawbar for multi-directional movements relative thereto and relative to the frame of the motor grader. A pair of generally vertically disposed hydraulic cylinders have their rod ends pivotally connected to the circle drawbar and their housings universally connected to a pair of indexing discs rotatably mounted on either side of the frame. A detent is reciprocally mounted on the frame to engage one of a plurality of circularly disposed recesses formed in each indexing disc. A first link is pivotally interconnected between the frame and a second link which is further pivotally connected to the circle drawbar. A cylinder is pivotally interconnected between the circle drawbar and the first link whereby the blade may be side shifted and disposed substantially vertically on either side of the frame. A motor may be mounted on the frame to selectively rotate each of the indexing plates and the detent may be selectively retracted, also under control of the operator.

REFERENCES:
patent: 1922880 (1933-08-01), Carswell et al.
patent: 3164915 (1965-01-01), Benner et al.
patent: 3677350 (1972-07-01), Johnson et al.

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