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苏联于1961年对三台Э—302型挖掘机动臂提升絞車的工作情况进行了观察,发現絞車的中心齿輪耐磨性不夠和行星齿輪銷軸压配合松动。在观察过程中,曾研究了中心齿輪耐磨性不夠的原因,并提出了提高齿輪耐磨性的建議。测量表明,挖掘机工作2500—3000小时后,中心齿輪的齿厚为5.5—6.0毫米,其标准尺寸为7,578_(-0.150)~(-0.070)毫米。在这种磨損情
In 1961, the Soviet Union observed the working conditions of the Sancha-302 excavator boom-lifting winch, and found that the winch’s central gear was not sufficiently wear-resistant and the planetary gear pin was loosely press-fitted. During the observation process, the reason why the wear resistance of the sun gear was not sufficient was studied, and suggestions for improving the wear resistance of the gear were proposed. Measurements show that after 2500-3000 hours of excavator work, the tooth thickness of the center gear is 5.5-6.0 mm, and its standard size is 7,578-(-0.150)-(-0.070) mm. In this kind of wear