변속기용 전위 헬리컬기어 설계프로그램개발

Development of a Gear Design Program for a Shifted Helical Gear Transmission

A new interactive computer program for design and examination of automobile transmission gear is developed. The design data of a shifted helical gear sets are calculated and the contact ratio and the strength condition are examined. The involute curve and a root fillet of the designed tooth profile are graphically presented, and the information for tooth profile such as root point, weakest point, etc. are obtained. The whole engaging gear shape and contact state are certificated in Autocad. To check the lubrication conditions, the minimum film thickness is calculated and compared with the surface roughness data. Therefore the computer program made in this paper gives more improved practical tool in designing an automobile gear set.