Abstract
Let the marine transmission using conical gears be called "Conical Drive Marine Transmissions". For these years, marine transmissions having high capacity have become an urgent need. To answer this need, it is necessary to increase both the tooth surface strength and the bending strength. The authors have already developed concave conical gears which made it possible to increase the tooth surface strength. And now, as the gears which makes it possible to increase the bending strength, we invented a new type of concave conical gear, called "Hyper Conical Gear". That is to say, the Hyper Conical Gear is the gear having both the increased tooth surface strength and the increased bending strength. This research aims at developing the design and production system of the Hyper Conical Gear. In this report, the design and production method of Hyper Conical Gear used for marine transmissions is presented. First, the relationship between the basic dimensions and the mounting dimensions of Hyper Conical Gears used for marine transmissions is obtained. Thus, the design procedure of Hyper Conical Gears is presented Finally, test gears are designed and made for trial, the tooth bearing of the test gears measured and compared with analytical ones. And, it is proven that the design and production method of Hyper Conical Gears used for marine transmissions have the availability.
