一、前言二汽生产的 EQ—140汽车,装载五吨,拖挂三吨,使用上优点较多。近年对用户访问的结果表明,在平原上使用时,变速箱各档位齿轮未发现早期损坏现象;在山区、矿区和林区使用过程中,变速箱Ⅰ档齿轮有早期损坏。主动齿轮一般以齿面渗碳层深层剥落为多,被动齿轮一般以齿根弯曲断裂为多。 First, the foreword Two steam production EQ-140 car, loading five tons, towing three tons, the use of more advantages. The results of user visits in recent years showed that no early damage was observed in the gears of gearboxes when used on the plains. In the use of mountains, mines and forests, gearbox I gears were early damaged. The driving gear generally peels deep into the carburized layer of the tooth surface, and the driven gear generally has more root deforming and bending faults.