关键词: 谐波齿轮, 渐开线齿廓, 空间齿廓, 共轭齿廓, 放样

Abstract: Aiming at the different neutral curves in cross sections perpendicular to the axis made by the taper deformation under flexspline of harmonic drive produced by cam wave generator,a spatial tooth profile of circular spline was designed to improve meshing performance.The spatial tooth profile was constructed with a series plane tooth profiles in the cross sections by spatial deformation of flexspline.A design method for spatial tooth profile of circular spline which spatial engaged with deformed flexspline and a calculation method of backlash between engaged teeth surface were established.Based on the conjugated tooth profiles in planes,the spatial tooth profile was generated by using lofting algorithm,and the interference and backlash results were checked.The research found that the spatial tooth profile could increase the meshing domains and contact area.There was a little difference between the loft method of two sections with straight guide line and a series section loft spatial tooth profiles,which could meet the design requirement of normal precision of harmonic transmission device.

Key words: harmonic gear, involute tooth profile, spatial tooth profile, conjugate tooth profile, lofting