摆杆式举升机构的设计与研究

Design and Research of Pendulum Rod Lifting Mechanism

摆杆式举升机构是通过控制两摆杆相对转动来实现对物体的举升。为了解决由于摆杆举升机构举升运动的非线性造成有效举升量难确定的问题,采用了CAD几何作图法来模拟举升运动轨迹区域,并通过设计制造摆杆式车轮举升装置,证明了该方法简单有效。针对悬叉受力形式为悬臂结构,其受力条件较差,结构刚度较低;悬叉的移动需要门架支承,造成设备的整体体积较大;悬叉式举升机构多由液压和螺旋机构驱动,举升时只能做垂直方向的调整,水平调整需要人工手动完成,造成物体的水平对中调整困难的问题。在现场应用中,该机构体现出了结构简单、对中率高、体积小、重量轻及便于车载和野外使用的特点。

The lifting process of object for the pendulum rod lifting mechanism was achieved by controlling the relative rotation of two pendulums. Due to nonlinear movement of object in this lifting process, the effective lifting value was difficult to determine. In order to solve this problem, the simulation of movement region in the lifting process with AutoCAD geometry mapping method was be used. It was proved by design and manufacture of pendulum rod lifting device for heavy wheel that this method is simple, convenient and efficient. The stress form of suspension fork is cantilever structure and its stress conditions is poor, and the structure stiffness is relatively low; The movement of suspension fork needs the support of door frame, resulting in overall large equipment volume; suspeusion fork lifting mechanism is usually driven by hydraulic pressure and the screw mechanism, only being able to make the adjustment of the vertical direction when lifting, and the level adjustment needs to be done manually, causing the horizontal centring adjustment of the object difficult. It was atso shown by the application that the designed device is characterized by simple structure, high rate for the removal, light weight, small size, easy carrying in the vehwle and using in the field.