| 摘要 |
PURPOSE:To raise the ground grading performance and operability of bulldozer by a method in which blades are connected to the front ends of paired straight frames, the back end sides of the frames are set on the vehicular body in a back-and-forth slidable manner, and the frames are connected with a cross bar. CONSTITUTION:When lift cylinders 10 and 11 are driven, a blade 3 is lifted by rotation of straight frames 1 and 2. Also, when angle reach cylinders 6 and 7 are driven in the same direction, the frames 1 and 2 are slidden back and forth, and the blade 3 is put to a reach operation. When cylinders 6 and 7 are driven in the reverse direction or any one of the cylinders 6 and 7 is driven, the blade 3 is put into an angle operation, and when tilt pitching cylinders 8 and 9 are driven in the same direction, the blade 3 is put into a pitching operation. Furthermore, when the cylinders 8 and 9 are driven in the reverse direction, the blade 3 is put into a tilt operation.
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