Research on a Highly Durable and Heavy Duty Gearing
Ma Zhenqun，Wang Xiaochun
(School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

Abstract: A new type of gearing, symmetric arc-shaped gears, is introduced, based on analyzing the advantage and weak points of helical gears and herringbone ones. The key problem of mismatch control and manufacture of symmetric arc-shaped gears is perfectly solved by using suitable cutter tilt and new generating method. The machining principle is analyzed and a mathe-matical model is established. The tooth flank equation and differential geometrical parameters are discussed. The results show that the new type of gearing possesses the characteristics of high bend strength, smooth running, no axial force and so on. It can be predicted that symmetric arc-shaped gears will be a hopeful highly durable and heavy duty gearing.
Keywords: symmetric arc-shaped gearing;generation;tooth flank differential geometrical parameters