| 摘要 |
A line cutter 1 is fitted at a propeller 2 on a shaft 3 carried in a stern tube 4. Clamped to the shaft immediately in front of the propeller is a rotatable cutting blade unit 11 comprising a split hub 12, having two halves 121, 122, one of which carries one rotating blade 14 and the other of which carries two further blades 15. Bolts 16 clamp the halves to the shaft. A split collar 17 is clamped together and to the hub by bolts 17a at a machined groove 17b in the hub to provide a location groove 18 for a stationary cutting blade unit 21. This assembly has a single blade 22 integral with a half ring 23. A second half ring 24 is clipped by interlocking formations 23a, 23b to the first half ring. The two half rings are accommodated in the location groove 18, with the interposition of thrust washers 18a, 18b. |
