1.江苏理工学院 机械工程学院, 江苏 常州 213000
周忠仁(1997— ),男,江苏南通人,硕士研究生;研究方向为机构学与创新设计研究。
俞成涛(1987— ),男,安徽舒城人,博士,副教授;从事机械设计创新及医疗器械研究。
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周忠仁,俞成涛,周翔宇等.新型护理床椅的背板机构设计及分析[J].机械传动,2022,46(03):74-80.
Zhou Zhongren,Yu Chengtao,Zhou Xiangyu,et al.Design and Analysis of Backplane Mechanism for New Nursing Bed Chair[J].Journal of Mechanical Transmission,2022,46(03):74-80.
周忠仁,俞成涛,周翔宇等.新型护理床椅的背板机构设计及分析[J].机械传动,2022,46(03):74-80. DOI: 10.16578/j.issn.1004.2539.2022.03.012.
Zhou Zhongren,Yu Chengtao,Zhou Xiangyu,et al.Design and Analysis of Backplane Mechanism for New Nursing Bed Chair[J].Journal of Mechanical Transmission,2022,46(03):74-80. DOI: 10.16578/j.issn.1004.2539.2022.03.012.
针对现有护理床椅背部模块难以实现护理床及轮椅两种使用姿态一体互变的难题,提出了一种新型背板机构。通过串联多个功能单一的机构组合成一个串联式背板空间组合机构,并分析其空间自由度以满足运动需求。将目标尺寸参数化,利用最小包容面积法得出支撑连杆与背板及支撑架铰链的最佳位置。根据背板机构的几何关系和静力学分析结果,采用额定行程与工作行程分别为175 mm、230 mm,最大推力为1 000 N的JC35D型电动推杆作为驱动装置。根据优化参数和驱动装置型号设计护理床椅的背板机构,并运用SolidWorks装配整体虚拟样机。应用Simulation有限元分析插件,对护理床椅护理床姿态下的背板施加安全载荷进行应力分析,验证了结构强度的安全可靠性。在护理床姿态下利用Adams View软件对机构进行静态侧翻仿真试验,验证了背板承受侧翻试验载荷时满足稳定性要求。
Aiming at the problem that the back module of the existing nursing bed chair is difficult to realize the mutual change between the postures of the nursing bed and wheelchair,a new type of back plate mechanism is proposed. A serial backplane spatial combination mechanism is formed by connecting multiple mechanisms with single function,and its spatial freedom is analyzed to meet the motion demand. The target size is parameterized,and the optimal position of the support connecting rod,backplane and support frame hinge is obtained using the minimum inclusive area method. According to the geometric relationship and statics analysis result of the backplane mechanism,the JC35D electric push rod with rated stroke and working stroke of 175 mm and 230 mm and self-locking force of 1 000 N is used as the driving mechanism. The backplane mechanism of the nursing bed chair is designed according to the optimized parameters and the drive device type,and the overall virtual prototype is assembled by SolidWorks. The simulation finite element analysis plug-in is used to analyze the stress of the backplane under the posture of the nursing bed chair,and the safety and reliability of the structural strength are verified. Under the posture of nursing bed,Adams View software is used to carry out the static rollover simulation test of the mechanism,and the stability requirement of the backplane under the rollover test load is verified.
护理床椅背板机构参数优化有限元分析稳定性试验
Nursing bed chairBackplane mechanismParameter optimizationFinite element analysisStability test
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