辅助洗头装置结构设计与仿真

Structure Design and Simulation of Assistant Shampoo Device

针对老年人和残疾人的头部清洁提出一种辅助洗发机械装置的设计方案。基于我国居民头部尺寸的相关数据,得到结构设计基本参数。确定了辅助洗头装置的洗头方式为仰面平躺式,主体结构采用环绕使用者头部运动的运动方式。提出了两种手指设计方案,选择了结构相对简单、有效的环臂形气囊/软体机械手式结构,并且为软体机械手加入弹簧结构,有效规避了普适性差的缺点。利用Solidworks软件绘制了各结构的三维图及装配图。利用Simulation对传动轴和第一种设计方案的手指结构进行了静应力分析,传动轴在同时受到一个20 N的力和一个8 N·m的力矩的时候,轴上最大应力为5.613×10^(7) N/m^(2),远小于材料的屈服应力5.300×10^(8) N/m^(2),其最大位移为1.522×10^(-2) mm,在受到最大的力15 N时,手指所受最大应力为1.456×10^(6) N/m^(2),远小于屈服力2.757×10^(7) N/m^(2),手指的最大位移为1.817×10^(-4) mm,可以忽略不计。仿真结果表明,传动轴和手指结构完全符合设计要求。

A scheme of mechanical hair washing device was put forward for the elderly and the disabled.Based on the relevant data of head size of Chinese residents,the basic parameters of structural design were obtained.It was determined that the shampoo mode of the auxiliary shampoo device was lying on its back,and the main structure adopted the motion mode of moving around the user′s head.Two finger design schemes were proposed,the ring arm airbag/software manipulator structure with relatively simple and effective structure was selected,and the spring structure was added to the software manipulator to effectively avoid the disadvantage of poor universality.The three-dimensional drawing and assembly drawing of each structure were drawn by using Solidworks software.The static stress of the transmission shaft and the finger structure of the first design scheme was analyzed by simulation.When the transmission shaft received a force of 20 N and a torque of 8 N·m at the same time,the maximum stress on the shaft was 5.613×10^(7) N/m^(2),which was far less than the yield stress of 5.300×108 N/m^(2),and its maximum displacement was 1.522×10^(-2) mm,which was very small.When the maximum force was 15 N,the maximum stress on the finger was 1.456×10^(6) N/m^(2),which was far less than the yield stress of 2.757×10^(7) N/m^(2).The maximum displacement of the finger was 1.817×10^(-4) mm,which was very small and could be ignored.The simulation results show that the structure of transmission shaft and finger fully meets the design requirements.