近年来,铁路新造货车和许多运用中的货车已改装197726型无轴箱滚动轴承。通过几年的定点运用调查发现,轴承前盖螺栓孔处由于没有密封,有油脂泄漏,且前盖内侧与轴端间的油脂总是被水或杂质污染,影响着车辆的行车安全。为此部已下文要求在前盖螺栓处加装平行橡胶垫,如图1。但通过 In recent years, the new railway freight cars and many trucks in operation have been modified 197726 non-axis box bearings. After several years of fixed-point use of the survey found that the bearing bolt hole at the front cover because there is no seal, there is grease leakage, and the inner side of the front cover and the shaft between the oil is always contaminated by water or impurities, affecting the vehicle driving safety. To this end has been asked to install a parallel rubber pad at the front cover bolts, shown in Figure 1. But passed