| 摘要 |
A maritime jack up gearbox 10 comprising a casing 12, 14, a plurality of gear shafts 18, 22 supported for rotation in the casing and each carrying at least one gear wheel 20, 24. The gear shafts are disposed in parallel spaced apart relation to permit meshing of the gear wheels to define a gear train. The casing is provided with an aperture, having end caps 90, through which a first of the gear shafts 32 is installed in and removed from the casing by translation in an axial direction of the first gear shaft 32. The first gear shaft carries a first said gear wheel (52, fig 4) that cannot pass through the aperture and is removably installed on the first gear shaft 32 by translation in the axial direction of the first gear shaft 32. The first gear wheel (52) and first gear shaft 32 are provided with mating formations (e.g. splines) that prevent relative rotation between the first gear wheel (52) and first gear shaft 32. |
