宝山铜矿使用的W—100_2~1型挖掘机,伸臂上张紧链轮的调整螺杆(图1),由于种种原因经常损坏。更换时,费工、费时、费料、影响生产。几年前我们将它进行改革,改革后的结构如图2所示。经几年的使用证明,强度好、调整方便,经久耐用。改革已5年,至今仍完好无损。 The W-100_2 ~ 1 excavator used at Baoshan Copper Mine and the adjusting screw on the tensioning sprocket of the boom (Figure 1) are often damaged due to various reasons. Replacement, labor, time-consuming, fee materials, affecting production. We reformed it a few years ago, and the structure after the reform is shown in Figure 2. After several years of use proved that good strength, easy adjustment, durability. The reform has been for five years and is still intact.