| 摘要 |
A trencher comprises a ground running, powered vehicle which travels in a forward direction carrying a trenching wheel driven by power to rotate in a vertical plane containing the forward direction so that cutting tips on the wheel's periphery excavate spoil from the ground leaving a trench therebehind. A plough just behind the front end of the trenching wheel pushes the spoil aside from the trench. The plough comprises two blades in V-shaped disposition, each blade being at a respective opposite side of the trenching wheel with leading ends of the plough blades being nearer sides of the wheel then their trailing ends. The plough blades, which are vibrated by vibrators driven by hydraulic motors, are mounted by elastically deformable anti-vibration mountings on respective supporting plates alongside the plough blades. The plough blades and these plates are raisable and lowerable hydraulically, and can be held braced in any desired V-shape by hydraulic struts.
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