Bulldozer blade pitch control method and controller for the same

Details Bulldozer blade pitch control method and controller for the same Bulldozer blade pitch control method and controller for the same

1997-06-30

1999-01-26

Novosad, Christopher J.

Earth working

Automatic power control

172812, 172831, 701 50, E02F 376

Patent

active

058628681

ABSTRACT:
A bulldozer blade (10) is automatically reset to a predetermined excavating pitch while the bulldozer (20) is traveling backwardly after it has completed an operation of excavating, carrying, or dumping earth. The bulldozer blade (10) can be set to an excavating pitch, a carrying pitch, or a dumping pitch when excavating, carrying, or dumping earth while the bulldozer is traveling forwardly, the bulldozer blade being attached to the leading ends of frame members (15A, 15B) which are pivotally mounted on opposite sides of the vehicle body (20a) in such a manner that the bulldozer blade can swing longitudinally. The rotational angles of left and right lifting cylinders (21A, 21B), which are attached to the bulldozer blade, are detected by first detectors (23a, 23b) while the bulldozer is traveling backwardly after it has completed an operation of excavating, carrying, or dumping earth, and the bulldozer blade is automatically reset to a predetermined excavating pitch from the carrying pitch or the dumping pitch in response to a command issued by a controller (50) which receives detection signals from the first detectors.

REFERENCES:
patent: 5503232 (1996-04-01), Matsushita et al.
patent: 5560431 (1996-10-01), Stratton
patent: 5620053 (1997-04-01), Kamikawa et al.

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