| 摘要 |
<p>A boom mounted vegetation cutter comprises a boom (3) adapted in use to be connected to a carrier vehicle (1) and to extend transversely therefrom, a rotor housing (5) suspended from the outward end of the boom (3) by a boom bracket (6), hydraulic means for lifting and lowering the boom (3) and for adjusting the reach thereof, and control means for regulating the height of the boom bracket (6) in relation to the surface on which the carrier vehicle (1) travels. The boom bracket (6) is connected to the rotor housing (5) by a connection mechanism (7, 8) providing for movement at a constant angular attitude of the rotor housing (5) relative to the boom bracket (6) through a permitted range of motion in a direction towards or away from the surface to which the rotor housing is applied, further detection means (21, 22) are provided to monitor the motion of the connection mechanism (7, 8) and to provide a signal to the control means which regulates the elevation of the boom (3) and restores the connection mechanism (7, 8, 26) within its permitted range of motion. <IMAGE></p> |
