Structure and principle of operation on a new cycle locating device were introduced in this paper. Moving process was analyses in detail. Through emulating

it was proved that only a couple of gear tooth and roller could contact under normal condition. This research provided feasible basis for gear tooth’s strength verification. And relationship

between displacement

velocity and acceleration of thrust chain and sprocket turning angle was founded. Through controlling difference of actual and theoretical moving trace

chain moving stable ability was improved and thus demonstrated the potential for being developed.