Marine vessel propulsion apparatus
AssigneeHonda Motor Co., Ltd.
InventorNorikazu Kawai
Life of this patent
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Abstract
A propulsion apparatus includes a screw, a unit case, an anti-cavitation plate, a heat generation portion, and a cooling liquid passage. The screw is submerged in outside water and generates a propulsion force. The unit case accommodates at least a power transmission mechanism which transmits power from a drive source to the screw. The anti-cavitation plate is arranged on the unit case at a higher position than the screw, and at least part of the anti-cavitation plate is submerged in outside water. The heat generation portion is arranged at an inside or an outside of the unit case. The cooling liquid passage causes a cooling liquid to flow to the heat generation portion. Part of the cooling liquid passage is arranged within the anti-cavitation plate.
Claims15
A marine vessel propulsion apparatus, comprising:
- a screw that is submerged in outside water and generates a propulsion force;
- a unit case that accommodates at least a power transmission mechanism which transmits power from a drive source to the screw;
- an anti-cavitation plate that is arranged on the unit case at a higher position than the screw and is at least partially submerged in outside water;
- a heat generation portion that is arranged at an inside or an outside of the unit case;
- and
- a cooling liquid passage that causes a cooling liquid to flow to the heat generation portion,
- wherein part of the cooling liquid passage is arranged within the anti-cavitation plate,
- the part of the cooling liquid passage has a plurality of flow passages through which the cooling liquid flows,
- the plurality of flow passages are arranged in parallel with each other, and
- a plurality of irregular portions, each having a corrugated shaped cross-section along each of the flow passages, are formed on an outer surface of the anti-cavitation plate.
Dependencies are inferred from the claim text.