Based on the analysis of the impact force resulted from forced reversing on load-belt pumping units,a sliding joint is provided for connecting the counterbalance weight with the belt-connecting frame.

• 根据对宽带长冲程抽油机械换向时产生的冲击力所进行的分析与计算,提出一种将配重与其上下胶带连接架作成可移式的改进结构。