| CPC B63H 21/386 (2013.01) [B63H 20/12 (2013.01); B63H 21/21 (2013.01); B63H 23/06 (2013.01); B63H 23/34 (2013.01); F16H 57/0415 (2013.01); F16H 57/0424 (2013.01); F16H 57/043 (2013.01); F16H 57/0436 (2013.01); F16H 57/0452 (2013.01); F16H 57/0476 (2013.01); F16H 57/0495 (2013.01)] | 9 Claims |
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1. An outboard engine which is provided on a hull and propels the hull, the outboard engine comprising:
a steering mechanism having a pod propulsion device disposed in water outside the hull;
a propulsive drive mechanism that is disposed in the hull and gives a propulsive drive force to the pod propulsion device; and
a circulation cooling circuit which has an outward flow path that supplies a cooling oil to the steering mechanism and the propulsive drive mechanism, and an inward flow path which recovers the cooling oil from the steering mechanism and the propulsive drive mechanism,
wherein the inward flow path and the outward flow path of the circulation cooling circuit communicate with each other inside a housing of the pod propulsion device,
the steering mechanism has a turning shaft having a cylindrical shape which pivotally supports the pod propulsion device around a vertical axis in a freely turnable manner,
the propulsive drive mechanism has a driving shaft which is coaxially disposed in the turning shaft and transfers the propulsive drive force,
the inward flow path has a driving shaft inside flow path which passes through an inside of the driving shaft and communicates with an inside of the housing, and
the outward flow path has
a driving shaft outside flow path which is formed between an outer peripheral surface of the driving shaft and an inner peripheral surface of the turning shaft and communicates with the inside of the housing, and
a screw blade coaxially provided on the outer peripheral surface of the driving shaft.
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