Abstract: The scissors aerial working platform (SAWP) usually uses the hydraulic cylinder to drive the expansion and contraction of the scissor mechanism to control the lifting and lowering of the platform, but this method has the problems of hydraulic oil leakage and low energy utilization. Therefore, the dynamic parameter matching of the lifting mechanism driven by an electric linear actuator (ELA) was studied. Firstly, taking a SAWP as a research object, its lifting mechanism model was established to determine the dynamic parameters of the ELA in the lifting process of the platform. Then, the hinge point optimization method was used to optimize the installation position of the hinge point of the ELA. According to the lifting performance, the dynamic parameters of the ELA were matched. Finally, in order to verify the effectiveness of the dynamic parameter matching of the electric push rod, the performance comparison experiment was carried out between the electric push rod and the original hydraulic system of the scissor overhead working platform. The results show that the matching ELA after parameter matching can effectively complete the action requirements of the oil cylinder under the condition that the lifting performance of the platform remains unchanged, and the energy utilization rate of the ELA is about 81.3% higher than that of the hydraulic cylinder, which shows that the ELA can effectively meet the performance requirements of the lifting mechanism, and it can not only overcome the hydraulic oil leakage, but also reduce the installed capacity of the battery by improving the power utilization efficiency, so as to effectively reduce the manufacturing cost of the whole vehicle.

Key words:  scissors aerial work platform(SAWP); lifting mechanism; electric linear actuator (ELA); parameter matching

LIU Ji-chao, ZHANG Wei-kang, ZHENG Zi-chong, et al. Parameter matching of lifting mechanism of scissors aerial work platform［J］.Journal of Mechanical & Electrical Engineering, 2022,39(2):173-179.