Abstract: In order to analyze the strength and dynamic performances of helical gears as accurately as possible, the actual load distributions along the contact lined of helical gears should be firstly calculated. Based on the coordinate systems of gear profile and the corresponding matrices of coordinate transformation, an effective method for determining the load distribution of external or internal helical gears is proposed in this paper. According to the reference coordinate system, the load distributions along the contact lines and load sharing ratio of helical gears during the whole engagement period can be simultaneously evaluated, and this will greatly reduce the CPU time. In the end of the present paper, a calculating example is given.

Key words: 斜齿圆柱齿轮, 载荷, 坐标