一种多功能越障轮椅的结构设计与仿真分析

Structural Design and Simulation Analysis of a Multi-function Obstacle-crossing Wheelchair

针对下肢残障及行动不便的特殊人群出行需求,设计了一种基于人机工程学的多功能越障轮椅。采用电机控制推杆伸缩运动的方式实现越障功能,同时轮椅具有升降、靠背调节、爬坡等功能,对应这些功能设计了执行机构。基于FUSION软件建立了轮椅的三维模型,通过ANSYS对三维模型和推杆进行受力分析,判断其满足强度要求;利用MATLAB软件对3组推杆的空间分布进行优化,使推杆组合运动达到最省力状态;在ADAMS软件上对轮椅进行运动仿真,以确保其可行性。试制的实物样机测试表明,轮椅的各项功能已实现,满足人机工程学,证明设计合理。

A multi-functional obstacle-crossing wheelchair based on ergonomics was designed for special people with lower limb disability and mobility inconvenience.The motor was used to control the stretching motion of the pushrod to realize obstacle-crossing function,the wheelchair had the functions of walking,lifting,backrest adjustment,climbing and so on,and the corresponding executing agency was designed.Based on FUSION software,a three-dimensional model of the wheelchair was established,and ANSYS software was used to analyze the force condition of the three-dimensional model and the pushrod,and intensity of the mechanism was judged.MATLAB software was used to optimize the spatial distribution of three groups of pushrods,so that the combined movement of pushrods could reach the most labor-saving state.The motion simulation of wheelchair was carried out on ADAMS software to ensure its feasibility.The prototype test shows that the functions of the wheelchair are realized,meet the ergonomics,the design is reasonable.