A trolley used for testing movement performance of vehicle wheel by planet detection means is prepared as roll C connecting top linear track on trolley support to top linear bearing A and B on trolley mechanism, roll C connecting bottom linear track on trolley support to bottom linear bearing A and B on trolley mechanism, setting left and right vertical column and driving mechanism of trolley support on the ground, winding steel wire rope on master and slave pulley of driving mechanism and fixing two ends of said rope separately on two side of boss on trolley support. |