我中心有一台卡特彼勒公司生产的液压挖掘机,经长期使用,其回转液压马达驱动轴和回转减速箱传动轴接合部位的外、内花键严重磨损。如采用更换零件的方法修理,需同时更换液压马达驱动轴和回转减速箱传动轴,修理费用较高。我们根据其结构特点,采用附加零件法修理,取得了成功。到目前为止已正常工作了300多小时。 根据结构得知,液压马达驱动轴外花键与回转减速箱传动轴内花键结合时,其实际结合长度只有 Our center has a hydraulic excavator manufactured by Caterpillar. After long-term use, the outer and inner splines of the joints of the rotary hydraulic motor drive shaft and the rotary reducer drive shaft are seriously worn. If parts are repaired by replacing the parts, the hydraulic motor drive shaft and the rotating reduction gear box drive shaft must be replaced at the same time, resulting in higher repair costs. According to its structural characteristics, we have used the additional parts method to repair and achieved success. So far it has been working normally for more than 300 hours. According to the structure, when the spline of the drive shaft of the hydraulic motor is combined with the spline of the drive shaft of the slewing reduction gearbox, the actual combined length is only