INVERSION BEARING FOR DOUBLE INVERSION PROPELLER

摘要

PURPOSE: To provide an inversion bearing for a double inversion propeller which can lubricate an inversion bearing without reducing strength of an inner shaft with a small number of oil supply ports. CONSTITUTION: An inner shaft 2 is operated for driving a rear propeller, while an outer shaft 1 is operated for driving a front propeller. An inversion bearing of a double inversion propeller for invertingly driving both the shafts has a hollow space 3 at an axial center of the inner shaft 2. Within a range L from the hollow space 3 to a bearing surface of the inner shaft 2, a plurality of oil supply ports 4 each penetrating to an outer peripheral surface of the inner shaft 2 are spirally formed in a line. An axial oil groove 5 including an opening 4a at the inner shaft surface of the oil supply port is formed on an outer periphery of the inner shaft.