Abstract
Eccentric helical curve-face gear pair is a new type of gear pair consisting of a helical non-circular gear and an eccentric helical curve-face gear, which can implement the rotation of intersected axes as well as the movement of output axes. According to the conjugate surface theory and the spatial coordinate transformation theory, the coordinate system, the meshing equation and the tooth surface equation of eccentric helical curve-face gear are obtained. Based on the spatial gear engagement theory, the undercutting and pointing phenomenon of eccentric helical curve-face gear are analyzed, and equations of tooth width of eccentric helical curve-face gear are proposed. By changing the different parameters of eccentric helical curve-face gear pair, the influencing factors and variation of undercutting radius, pointing radius and tooth width are derived. Furthermore, by building the experiment devices of the roll testing and the transmission, the correctness of the calculation method of tooth width of eccentric helical curve-face gear is verified by using the contact analysis and the experimental verification.
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