| 摘要 |
An angle control, particularly for a bulldozer or tractor blade having a U-shaped frame, including a pair of piston-cylinders on each side of the vehicle and a hydraulic control. The cylinders of each pair of piston-cylinders are rigidly connected in vertically stacked overlapping relation above the side portions of the U-shaped frame with the piston rods extending in opposite directions. One piston rod of each pair is operably connected to one side of the blade and the opposed piston rods are connected to the frame. The control simultaneously extends one pair of piston-cylinders while retracting the opposed pair to angle the blade about a vertical axis. In one embodiment, the piston rods are solid with the hydraulic control including flexible lines connected to the hydraulic cylinders. In the other embodiment, the rearwardly extending piston rods are hollow having passages to the head and rod ends of the hydraulic cylinders.
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