多功能电动轮椅关键机构设计与仿真分析

Design and Simulation Analysis of Key Mechanism of Multi-Function Electric Wheelchair

针对行动不便的老年人和下肢残障人士的护理需求,设计了一款集多种功能于一体的电动轮椅。通过对电动轮椅功能需求分析,设计了相应的实现机构,利用SolidWorks软件建立了电动轮椅的三维模型;基于Adams仿真软件对电动轮椅的升降机构、脚踏机构进行了运动学仿真,获取关键节点的位移、速度、加速度曲线,结果表明升降机构、脚踏姿态调节机构运动平稳,验证了结构设计的合理性;利用ANSYS workbench软件对升降机构在两种极限工况下以及脚踏机构在使用者上下轮椅工况下进行静力学分析,结果表明升降机构和脚踏机构满足刚度和强度要求。

Aiming at the nursing needs of the elderly and the disabled,an electric wheelchair with multiple functions is designed.By analyzing the functional requirements of the electric wheelchair,the corrsponding implementation mechanism is designed,and the 3d model of the electric wheelchair is established with SolidWorks software.Based on Adams simulation software,the ki⁃nematics simulation of lifting mechanism and pedal attitude adjustment mechanism of electric wheelchair was carried out,and the dis-placement,speed and acceleration curves of key nodes were obtained.The results showed that the lifting mechanism and pedal attitude adjustment mechanism moved steadily,which verified the rationality of structural design.ANSYS workbench soft⁃ware was used to conduct static analysis on the lifting mechanism under two kinds of limit conditions and the pedal mechanism under the user′s upper and lower wheelchair conditions.The results showed that the lifting mechanism and pedal mechanism met the requirements of stiffness and strength.