| 摘要 |
A Counter-Rotating Shaft Drive Mechanism for a boat comprises an engine gearbox output shaft coupling ( 2 ); a differential arrangement which creates counter-rotating outputs in a dual output shaft arrangement and comprises a housing ( 1 ) and removable maintenance plates ( 4 ), means for arresting rotation of the differential housing and a coupling between the shaft arrangement and a twin propeller arrangement. A single drive gear ( 8 ) may be used to drive the output shaft arrangement which may comprise a pair of concentrically arranged shafts ( 5 ) and ( 9 ) which rotate in opposite directions. The inner and outer shafts may have rubbing pads arranged between them, while the shaft arrangement may operate as s self-lubricating sealed unit. The housing, maintenance plates, and shafts may be manufactured from a metallic material, a plastic polymer or a carbon composite. The Marine Counter-Rotating Shaft Drive Mechanism has been designed to be both retrofitable, and factory fit.
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