Design requirement All the wheels of the trolley are connected by steel bars, so all the wheels could be involved in the turning. After the analysis of the steering mechanism and the kinematics of the moving, we build a model and optimize the mechanism to make the turning possible in small space. Considering the applicability, we install additional tow bar to make it possible towed on both sides, on the same time it is also available for several trolleys to move together, which will save a lot of time for the transportation during the warehouses.
