传动轴，是一种机械组件，主要用于传递扭矩、旋转，通常用于组件间距离较远或不容易直接发送的情况。传动轴通常由一个或多个万向接头、爪型联轴器等组件组合而成。

A drive shaft, driveshaft, driving shaft, propeller shaft (prop shaft), or Cardan shaft is a mechanical component for transmitting torque and rotation, usually used to connect other components of a drive train that cannot be connected directly because of distance or the need to allow for relative movement between them.