Li Xin 

Department of Mechanical Engineering,

University of Maryland,

Maryland, U.S.A.

He Weidong

Department of Mechanical Engineering,
Dalian Railway Institute,

Dalian 116028, China

Linda Schmidt
Department of Mechanical Engineering,

University of Maryland,

Maryland, U.S.A

Li Lixing

Department of Mechanical Engineering, Dalian Railway Institute,

Dalian 116028, China

EFFICIENCY ANALYSIS OF DOUBLE

CRANK RING-PLATE-TYPE
PIN-CYCLOIDAL GEAR
PLANETARY DRIVE*

Abstract: From the general formula for calculating the efficiency of planetary gear trains, the efficiency of the double crank ring-plate-type pin-cycloidal gear planetary drive is derived. To prove the theory, an experimental study has been conducted. The tested value of the efficiency of a sample set of the new-type drive in the experiment agrees with the calculated one. It shows that the new-type drive is of not merely high bearing capacity, but also quite high efficiency.