# 第三篇 机械传动

## 传动的重要性及意义

1. 运动形式的改变、运动参数的改变
2. 调速
3. 一台原动机带多个相互间具有逻辑联系（传动比）的工作机
4. 分隔原动机与工作机：保证安全，便于维护

## 传动的分类

![传动的分类](https://oss.muzing.top/image/20211029211020.png)

广义的机械传动：

* 摩擦传动
  * 带传动
  * 摩擦轮传动
* 啮合传动
  * 共轭啮合 —— 齿轮传动（直齿斜齿圆柱圆锥、蜗轮蜗杆……）
  * 非共轭啮合 —— 链传动
* 液压与气动

## 传动的影响因素

功率

传动比

圆周速度

质量与尺寸

一个典型的传动顺序：带传动 - 齿轮传动 - 链传动


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