Journal of Jilin University(Engineering and Technology Edition) ›› 2019, Vol. 49 ›› Issue (5): 1558-1566.doi: 10.13229/j.cnki.jdxbgxb20180982

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Mechanical structure design and optimization of weight-support STS rehabilitation training system

En-guo CAO1(),Kun LIU2(),Shuo JI2,Zhen-yuan SUN2,Hong-wei XU2,Xing-ji LUO2   

  1. 1. School of Design, Jiangnan University, Wuxi 214122, China
    2. School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China
  • Received:2018-09-25 Online:2019-09-01 Published:2019-09-11
  • Contact: Kun LIU E-mail:nguocao@jiangnan.edu.cn;kunliu@jlu.edu.cn

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Abstract:

Based on ergonomics, this paper designs and optimizes a multi-functional training machine structure for sitting-to-standing (STS) exercise and rehabilitation, which enables patients to carry out weight-loss rehabilitation training according to the track of the healthy body. The structure of lower extremity orthodontic exoskeleton and the top dumbbell spiral winding wheel were designed. The mechanical analysis and dimension optimization of the whole mechanical structure and main components were carried out. Users with lower extremity dyskinesia can get STS exercise assistance, and perform lower extremity muscle rehabilitation training according to the correct exercise plan of healthy people when they stand up, that avoids muscular abnormal exertion caused by the distortion of standing posture, thus obtaining safe and healthy rehabilitation.

Key words: mechanical design, STS rehabilitation training, structure optimization, weight support

CLC Number: 

  • TN122

Fig.1

Mechanical structure of STS rehabilitation training"

Table 1

Detailed list of components in structure"

序号 部件名称 序号 部件名称
1 顶吊装置 11 移动支撑杆
2 支撑斜梁 12 可刹车万向轮
3 支撑细杆 13 底座横梁
4 支架内管 14 下肢外骨骼
5 主控传动箱 15 梯形轨架结构
6 支撑外杆 16 第一横梁
7 扶手横梁 17 一号皮带
8 定位滑块 18 三通件
9 扶手支架 19 第二横梁
10 底座主梁 20 紧固螺钉

Fig.2

MATLAB simulation curve and stereogram of spindle structure"

Fig.3

Finite element analysis of spindle structure"

Fig.4

Pentagonal structural diagram of trapezoidal support during standing"

Fig.5

Static analysis result of initial design welding structure"

Fig.6

results of optimization and improvement of static analysis of design suppository structure"

Table 2

Optimization analysis results of mechanical structure design"

机械结构设计 编号 连接关系+杆件选取值 杆件壁厚/mm 最大位移/mm 最大应力/MPa 质量/kg
最初设计方案 1 焊接+自定值 5 43.39 462.3 44.51
改进优化方案 改进方案 2 焊接+工字梁及双斜拉管自定值 工字梁 12;梯形支架 3;其余 5 16.01 254.2 74.18
3 栓接+工字梁及双斜拉管自定值 工字梁 10;梯形支架 2.5;其余 4.5 19.56 315.1 64.19
优化方案 4 栓接+工字梁及单斜拉管自定值 工字梁 8;梯形支架 2;其余 4.5 19.46 323.7 58.88
5 栓接+工字梁及单斜拉管迭代优化值

工字梁 5.375;前伸顶梁 2;顶部支撑管 2;

三角形圆管 7.877;斜拉管 2.835;梯形支架 1;

底架方管 2.5;底架横梁 10

 20.00 322.7 40.82

Fig.7

Design optimization process of mechanical structure quality change line graph"

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