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目前采用行星小齿轮与大直径针齿轮啮合,作为各种起重机的旋转机构较为普遍(见图1)。其中行星齿轮硬度一般在HB280左右,而针齿硬度在HB230,因此使用一段时间以后,针齿两面有相当磨损,到一定程度就只能换针齿。现在我们把针齿从直槽改铣成直角槽(见图2)。则在使用一段时间后转90°再用,这样寿命就延长一倍,是行之有效的节约材料资源的妙法。
The current use of planetary pinion gear with large diameter meshing, as a variety of crane rotation mechanism is more common (see Figure 1). The planetary gear hardness is generally around HB280, and pin teeth hardness HB230, so after using for a period of time, there are considerable wear on both sides of the pin teeth, to a certain extent, only for pin teeth. Now we change the teeth from the straight groove to the right angle groove (see Figure 2). Then use a period of time to turn 90 ° reuse, so that life expectancy doubled, is an effective way to save material resources wonderful way.