| 摘要 |
<p>The bulldozer blade control mechanism according to the present invention has a U-shaped frame (22) fixed to the lower intermediate portion of the rear surface of a blade (20) so that the frame (22) can be turned in all directions, left and right lifting and angling hydraulic cylinders (62, 64) respectively fixed pivotably to between the left and right lower portions of the rear surface of the blade and the left and right portions of a chassis via arms (36, 38), left and right pitching and tilting hydraulic cylinders (40, 42) respectively fixed pivotably to between those portions of the arms (36, 38) which are in the vicinity of the rear ends thereof and the left and right upper portions of the rear surface of the blade, and left and right levers (56, 58) respectively fixed pivotably to between the left and right parallel leg portions of the U-shaped frame (22) and either of left and right hydraulic cylinders (62, 64) and left and right arms (36, 38). The above-described arrangement enables the blade to make a total of eight movements, i.e. upward and downward movements, left and right angling movements, left and right tilting movements and forward and backward turning movements through the operations of the four hydraulic cylinders.</p> |
