Abstract: The double crank ring-plate-type pin-cycloid planetary drive (abbreviated as DCRPTPCPD) is a new kind of cycloid drive with high load-capacity and high transmission efficiency. It may have several kinds of structural designs. Among them, two different structures are chosen to be optimally designed, manufactured, and tested. The result of the test proves that the prototypes have high load-capacity and high transmission efficiency. The two structures which possess better dynamic performance and higher load-capacity are introduced. The research for improving their dynamic properties is also discussed. The original DCRPTPCPD prototype with a three-gear-linkage has a noise level of 92 dB when running with maximum workload at a high speed. It is redesigned with a goal to reduce its noise and vibration levels. The new improved prototype has a noise level of 85 dB when running with maximum workload at a high speed. The 7 dB noise decrease makes its noise rating improved to “good”. In the meantime, its vibration property is improved as well.

Key words: Double crank ring-plate-type, Noise, Optimum design, Pin-cycloid planetary drive, Vibration