In order to improve the functional stability of the folding mechanism in the folding couplers on urban rail vehicles under the impact load of trains,this paper innovates the structural design of the folding mechanism by opti-mizing the selection of components like locking springs,and adding movable pulley assembly.Based on the operat-ing principle and load-carrying conditions of the main components in the folding mechanism,the functional relia-bility of the folding mechanism is theoretically analyzed and evaluated,and the reliability of the new folding mecha-nism is verified through longitudinal dynamics simulation and impact testing on a vehicle.Theoretical analysis and experimental results indicate that the new folding mechanism is easy to operate and can effectively ensure the func-tional stability of the folding mechanism under vehicle coupling or rescue operating conditions;Under 15 consecutive high-speed(over 5 km/h)impact loads,the new folding mechanism can be locked in place,and the coupling process of the vehicle is safe and reliable,which would provide some design references for the performance im-provement of folding couplers on subsequent urban rail vehicles.
关键词
折叠车钩/折叠机构/结构优化设计/理论分析/车辆冲击试验/锁定到位
Key words
folding coupler/folding mechanism/innovative structure design/theoretical analysis/vehicle impact test/locking in place
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