To reduce a forward axial load applied on a bearing for supporting a front driven gear on a case of an outboard engine during ship advancement.SOLUTION: A contra-rotating propeller type outboard engine comprises: an outer propeller shaft 4 and an inner propeller shaft 6 which are coaxially arranged; a rear driven gear 43 engaged, from a rear side, with a main drive gear 38 coupled with a lower end side of a drive shaft and coupled with a front end side of the outer propeller shaft 4; a front driven gear engaged with the main drive gear 38 from a front side, and coupled with the front end side of the inner propeller shaft 4; and a lower case 11 covering a front part of the outer propeller shaft 4, a front part of the inner propeller shaft 6, the main drive gear 38, the rear driven gear 43, and the front driven gear. On an outer peripheral side of the front part of the outer propeller shaft 4, a bearing 48 for rotatably supporting the outer propeller shaft 4 on the lower case 11 and receiving a forward axial load applied on the outer propeller shaft 4 is provided.SELECTED DRAWING: Figure 4

    【課題】船舶前進時に、前側被動ギヤを船外機のケースに支持するベアリングに加わる前方向のアキシャル荷重を低減する。【解決手段】二重反転プロペラ式の船外機は、同軸配置の外側プロペラシャフト4および内側プロペラシャフト6と、ドライブシャフトの下端側に結合されたメイン駆動ギヤ38に後方から噛合し、外側プロペラシャフト4の前端側に結合された後側被動ギヤ43と、メイン駆動ギヤ38に前方から噛合し、内側プロペラシャフト4の前端側に結合された前側被動ギヤと、外側プロペラシャフト4の前部、内側プロペラシャフト6の前部、メイン駆動ギヤ38、後側被動ギヤ43、および前側被動ギヤを覆うロアケース11とを備え、外側プロペラシャフト4の前部の外周側には、外側プロペラシャフト4をロアケース11に回転可能に支持し、かつ外側プロペラシャフト4に作用する前方向のアキシャル荷重を受けるベアリング48が設けられている。【選択図】図4


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    Title :

    OUTBOARD ENGINE


    Additional title:

    船外機


    Contributors:

    Publication date :

    2023-07-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



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