Development of Advanced Propeller Damper (Shift Dampener System)

Paper #:
  • 2013-32-9068

Published:
  • 2013-10-15
Pages:
7
Abstract:
Generally, the gearshift mechanism for outboard motors shifts into forward or reverse gear without using the synchromesh arrangement (dog clutch engagement)(See Fig.1). This type of shift mechanism has advantages in simple structure and in saving space and cost, but at the same time, this is often the source of problem due to the abrasion caused by the hitting of gear against the dog clutch before the engagement, as well as large gearshift shock and noise. In addition, the outboard motor horsepower is getting bigger in recent years. As they are equipped with bigger and heavier engines and propellers, the shifting shock and noise tend to become more severe. For this reason, the improvement in this aspect is required.We looked into the way to reduce the shock and noise by means of propellers, because the propeller can be mounted and replaced easily, which allows the effective improvement to be spread to the outboard motors already in the market. Consequently, the advanced propeller damper for reducing the gearshift shock and noise has been developed. This report presents the development process of the advanced propeller damper.
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