COOLING STRUCTURE OF OUTBOARD MOTOR

• Main Authors: AKUTSU GEN, ISHIHARA KOSHIN
• Format: Patent
• Language: English; Japanese
• Published: 02.03.2017
• Subjects: BLASTING; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To provide a cooling structure of an outboard motor capable of improving cooling efficiency.SOLUTION: A cooling structure of an outboard motor is equipped with a flywheel 41 which is attached to a shaft end of a crank shaft 22, and integrally rotates with the crank shaft 22; a cooling fan 44 which integrally rotates with the fly wheel 41; a recoil reel 51 which rotates the crank shaft 22 through the fly wheel 41 according to start operation; and a recoil case 60 which covers the recoil reel 51 and the cooling fan 44. The recoil reel 51 has a hub portion 52, a spoke portion 56, and a rim portion 54. The spoke portion 56 is formed with a communication hole 57 through which air passes from the recoil case 60 side toward the cooling fan 44 side. The rim portion 54 is disposed with an end portion on one side in a rotation axis direction facing an end portion on the other side in the rotation axis direction of the cooling fan 55.SELECTED DRAWING: Figure 4 【課題】冷却効率を向上させることができる船外機の冷却構造を提供する。【解決手段】クランクシャフト２２の軸端に取り付けられ、クランクシャフト２２と一体で回転するフライホイール４１と、フライホイール４１と一体で回転する冷却ファン４４と、始動操作に応じてフライホイール４１を介してクランクシャフト２２を回転させるリコイルリール５１と、リコイルリール５１および冷却ファン４４を覆うリコイルケース６０と、を備える船外機の冷却構造であって、リコイルリール５１は、ハブ部５２、スポーク部５６およびリム部５４を有し、スポーク部５６は、リコイルケース６０側から冷却ファン４４側に向かって空気が通る連通孔５７が形成され、リム部５４は、回転軸方向における一方側の端部が冷却ファン５５の回転軸方向における他方側の端部と対向して配置されることを特徴とする。【選択図】図４