圆弧齿廓谐波齿轮传动齿形设计中的几个问题

谐波齿轮传动采用圆弧齿廓后，可以改善柔轮齿根的应力状况和传动的啮合质量，提高承载能力和扭转刚度。本文首先计算出柔轮采用圆弧齿廓时，刚轮与之共轭的理论齿廓，通过用拟合圆弧对其进行逼近，得到拟合误差的变化规律；最后指出在开发双圆弧齿廓谐波齿轮传动时，应首先合理确定波发生器形式和柔轮径向变形量系数。

Several Problems in Tooth Profile Design of Harmonic Drive with Circular arc Peofile

If the circular arc tooth profile is adopted in harmonic drive, the stress condition on the tooth root of the flex spline and its meshing quality can be improved significantly,the load capacity and the torsional stiffness can also be increased. In this paper, the theoretical tooth profile of the rigid spline meshed with a flex spline with circular arc tooth profile was calculated, and the tooth profile error resulted form circular arc fitting was also investigated. It is pointed out that the style of wave generator and the radia deformtion coefficient of the flexspline must be worked out first while developing the harmonic drive with circular arc tooth profile.