Marine propulsion system

B - Operations – Transporting – 63 – H

Patent

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Details

B63H 5/125 (2006.01) B63H 20/00 (2006.01) B63H 21/22 (2006.01) B63H 23/24 (2006.01) B63H 23/36 (2006.01)

Patent

CA 2390818

In prior stern drive marine propulsion systems, power is transmitted through an arrangement of clutches, bevel gears and shafts to the propeller located below the water surface. This restricts the amount of torque which can be transmitted particularly for large commercial boats. The present invention therefore provides an outdrive designed to surpass the horsepower and torque limitations set by current state-of-the-art units. In order to meet these objectives the outdrive was designed to incorporate a multi-strand roller chain drive (40), replacing the conventional bevel gear arrangement. Using a chain drive in this application serves to increase durability of the outdrive, while keeping the outer (43) casing very streamlined.

Dans les systèmes de propulsion marine semi-hors-bord antérieurs, la puissance est transmise par un aménagement d'embrayages, d'engrenages coniques et d'arbres d'hélice situé au-dessous de la surface de l'eau, ce qui limite le couple pouvant être transmis, notamment pour de grands bateaux commerciaux. La présente invention concerne un arbre extérieur conçu pour dépasser les limitations de puissance en chevaux et de couple imposées par l'état actuel de la technique. Pour atteindre ces objectifs, l'arbre extérieur a été conçu de manière à incorporer un mécanisme (40) de transmission par chaîne à rouleaux multibrins, qui remplace le dispositif d'engrenages coniques classique. Le recours à un mécanisme de transmission par chaîne dans cette application permet d'accroître la durabilité de l'arbre extérieur, et de maintenir en même temps un bon profil aérodynamique de l'enveloppe (43) extérieure.

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