Background:
Nutation drive is being extensively investigated due to its ability to achieve a
high reduction ratio with a compact structure and the potential for low vibration, high efficiency and
design flexibility. However, many problems including the difficulty to process the inner bevel gear, less
number of teeth in engagement and not being suitable for high-power transmission have restricted its
development.
Objective:
The purpose of this paper is to analyze the contact strength of a patent about a new nutation
drive developed based on meshing between two face gears, which has the advantages of both face gear
and nutation drive, including large transmission ratio, large coincidence, small size, compact structure
and strong bearing capacity.
Methods:
Based on the meshing principle and basic structure of the nutation face gear drive, the contact
strength of nutation face gear transmission is analyzed by the Hertz contact analysis method and FEM
method.
Results:
The maximum stress values of nutation face gear teeth are compared by two methods, which
verify the accuracy of Hertz contact analytical method in calculating the contact strength of nutation
face gear teeth. Furthermore, nine groups of three-dimensional models for the nutation face gear drive
with a transmission ratio of 52 and different cutter parameters are established.
Conclusion:
The study analyzes the contact stress of fixed and rotary face gears in meshing with planetary
face gears, and obtains the distribution law of contact stress and the influence of the number of
teeth and parameters of the cutter on the load-carrying capacity.
Experimental study of transmission ratio changing mechanism for motorcycle applications
