Dynamic Influence Research On Worker’s Behaviors To Scissor Lift Mechanism

Due to its simple and compact structure, large loading capability and stable operation Scissor Lift Mechanism(SLM) is a kind of common lifting mechanism which is widely used in various fields such as factory, construction and airport. The operation reliability, security and stability of SLM will be directly related to safety of workers on it and operation safety to its service object, such as airport and aircraft.In this paper, rigid model of SLM is established firstly; the tip-over stability is calculated theoretically and simulated based on ADAMS according to the different possible tip-over scenarios, Worker’s behaviors that could influence SLM tip-over stability are discussed. Then the scissor arms are handled as flexible bodies to build a rigid-flexible coupled model of SLM.Based on the proposed rigid-flexible coupled model, vibration characteristics of SLM under different behavior cases are analyzed, To further study vibration performance of SLM, a linear spring is introduced to replace input actuator in the end of lifting, scissor-like structure vibration system is herein established. Meanwhile, a universal nonlinear stiffness equation of full types of proposed vibration system(including six assembly types) is built up through mathematical analysis. Plus, vibration response performance of proposed vibration system with different assembly types and installation parameters is investigated. Finally, a comparative study is executed between proposed vibration system and some classic isolators to clarify SLM’s dynamic property to inputs.Analysis about tip-over stability, vibration characteristics and other dynamic problems of SLM provides a necessary basis for safety of design and application, and can be expanded to other fields.