用于狭窄空间的新型伸缩臂的设计与研究

DESIGN AND STUDY A NEW TELESCOPIC ARM USED IN NARROW SPACE

由于水泵、燃油锅炉内管道难于检查,设计和研究了一种用于狭小空间的伸缩臂。该伸缩臂采用钢卷尺模型的机械结构,沿卷尺的边缘焊接形成机械臂。电机通过齿轮驱动分度轮,分度轮带动机械臂伸缩,伸缩臂拥有卷曲存储功能。机械臂的截面参数包括厚度、圆心角、弧长,用弹性力学的薄壳理论分析计算了圆心角的取值大小。基于Workbench软件,分析了机械臂的圆心角、厚度对机械臂X和Y方向的伸直能力的影响。结果表明随着圆心角的增大,在Y方向的变形量逐步减小,在X方向的变形量逐步增大,在40°之前变化速率快,在40°之后变化速率慢;随着厚度的增大,在X、Y方向的变形量呈变小趋势。以理论和仿真研究为依据,确定了厚度0.1 mm和45°圆心角的尺寸,最终通过实验,得出了机械臂的真实承载情况,确定了机械臂的可靠性设计参数。

As it is difficult to check water pumps and fuel boiler pipes,design and study a telescopic boom used in narrow space.Adopt steel tape to design telescopic arm,and the tapes＇ edges are welded to form mechanical arm.Motor drive the divided wheel by gears,divided wheel drive steel tape to stretch,and telescopic boom has curly storage function.The arm＇s section parameters include thickness,central angle,arc length;By the thin shell theory,analyze and calculate the central angle.Based on the Workbench software,analyze the central angle and thickness＇ s infiuences to X and Y direction deformation.Results show that with the increase of central angle,the Y direction deformation decreases gradually,and the X direction deformation increases gradually.Deformation rate changes quickly before 40 °,and changes slowly after 40 °.With the increasement of thickness,the X and Y direction＇s deformation rate are smaller.Based on theory and simulation,the final thickness is 0.1 mm and the central angle is 45 °.Finaly through experiments,verify the arm＇s section parameters and bearing capacity.