根据带式输送机的某些特殊场合需要，又出现了介于分离式驱动和电动滚筒驱动形式之间的减速装置在滚筒体内部、电动机在滚筒体外面的外装式电动滚筒。
According to the special needs of belt conveyor in some occasions, there are also deceleration devices between separate drive and electric drum drive, which are installed inside the drum body and outside the drum body of the motor.
与分离式驱动装置相比，电动滚筒具有结构紧凑、传动效率高、噪声低、使用寿命长，运转平稳、工作可靠、密封性好、占据空间小、安装方便等诸多优点，并且适合在各种恶劣环境条件下工作。包括潮湿、泥泞、粉尘多的工作环境。
Compared with the separated driving device, the electric drum has many advantages, such as compact structure, high transmission efficiency, low noise, long service life, smooth operation, reliable operation, good sealing, small occupying space, convenient installation and so on, and is suitable for working in various harsh environment. Including wet, muddy, dusty working environment.