Design and Analysis of Internal-External Composite Meshing Hy-Vo Chain

Featured Application Transfer case of hybrid vehicle.Abstract The internal-external composite meshing mechanism should be the best way to improve the transmission performance of a silent chain drive, but there is no internal-external composite meshing Hy-Vo chain under the classical design approach. In this research, by building the Hy-Vo chain meshing system, the difference between the meshing of the chain-sprocket and the meshing of the rack-gear is deeply analyzed. By rigidifying the external meshing Hy-Vo chain as a rack, the fluctuation range of the pitch line of the external meshing Hy-Vo chain is analyzed. Based on the relations between the actual chain pitch line and the rigid chain pitch line, the design method for the internal meshing profile of the internal-external composite meshing Hy-Vo chain is deduced, the necessary conditions are obtained, and the meshing characteristics are analyzed. By conducting comparative multi-body dynamics experiments, the results prove that the design method of the internal-external composite meshing Hy-Vo chain proposed in this study is effective and feasible. The results also show that the description of the internal-external composite meshing in the classical meshing theory is not completely correct. In fact, the internal-external composite meshing mechanism cannot reduce the meshing impact of the Hy-Vo chain system and can only improve the system polygon action, the meshing performance, and the transmission stability.

Automated summary

In this study, the difference between the meshing of the chain-sprocket and the meshing of the rack-gear in a hybrid vehicle's transmission system was analyzed. By rigidifying the external meshing Hy-Vo chain as a rack, the fluctuation range of the pitch line of the external meshing Hy-Vo chain was analyzed. A design method for the internal-external composite meshing Hy-Vo chain was deduced, and its effectiveness and feasibility were proven through experiments. The study also showed that the description of the internal-external composite meshing in the classical meshing theory is not completely correct.