M7120A平面磨床磨头手摇机构的齿轮轴(如图1所示)是根立轴。由于立轴经常转动和上下移动,容易磨损,油从齿轮轴向下漏。严重时,油液还从齿轮与齿条啮合处向外四溢,污染环境。针对上述情况,以往我们采取重磨缸体和更换活塞的方法。缸体内孔与活塞外圆的配合精度较高,为间隙密封。但由于我厂设备条件有限,不易达到此配合精度,所以装配使用后还有漏油。 M7120A surface grinder grinder hand crank body gear shaft (Figure 1) is the vertical axis. As the vertical shaft rotation and up and down often move, easy to wear, oil leakage from the gear shaft. Seriously, the oil is also overflowing from the gear and rack engagement, polluting the environment. In response to the above situation, in the past we take the regrinding of the cylinder and replace the piston method. Cylinder bore and piston with a high degree of precision cylindrical, for the gap seal. However, due to the limited equipment in our factory, it is not easy to achieve this coordination accuracy, so there is oil leakage after the assembly is used.