Abstract
A novel speed reducer with self-adaptability to variable transmission angles is proposed in this paper, in which a planetary gear mechanism with a difference of a few teeth and an RCRCR (R-revolute pair, C-cylindrical pair) spatial mechanism are integrated. The difference of a few teeth presents the advantages of high transmission ratio and compact structure, while the RCRCR spatial mechanism achieves the translational motion of the planetary gear in space. Theoretical kinematics analyses are carried out to prove the motion of each component in space. Models are established in the Automatic Dynamic Analysis of Mechanical Systems (ADAMS) to verify the performances of universal transmission and torque fluctuation tolerance. The simulation results demonstrate that the proposed speed reducer maintains a stable transmission ratio with variable transmission angles, presenting a high level of tolerance with the position perturbations. Strength analysis and manufacturing and lubrication guidelines of the prototype design are presented.
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