| 摘要 |
Amphibious construction equipment comprising a working unit supported on a pair of elongate, parallel, buoyant pontoons (2) each of which carries a caterpillar track (3) driven by sprockets mounted on an axles (5), the axles (5) being positioned at or towards the ends of each pontoon (2) on its upper surface, wherein each axle (5) is driven by at least one hydraulic motor (4), all the motors (4) being powered by a single hydraulic pump (7), the motors (4) on each pontoon (2) being arranged such that they run synchronously as to both direction and rate but not necessarily in the same direction or at the same rate as the motors (4) on the other pontoon (2). |
