文档介绍：购买后包含有 CAD 图纸和说明书,咨询 Q401339828 目录摘要························································ 3 Abstract ····················································3 变速器的简介················································4 ································6 、部件结构方案分析······························7 ··········································8 1. 变速器的参数选择··········································8 一档齿轮齿数的确定····································8 中心距 A的选择········································9 确定齿轮参数·········································10 齿宽选择·······································10 压力角·········