电动葫芦结构紧凑，电机轴线垂直于卷筒轴线的电动葫芦采用蜗轮传动装置。其缺点为：长度尺寸大，宽度方面尺寸大，结构粗笨，机械效率低，加工较难等。液压系统为双重控制，溢流调节阀、磁接点压力表均可对压力进行精确的控制。电器控制部门采用了低电压控制，增加了支配系统的安全性。Quality Assurance of Electric Hoist in Henan Zhongyu Crane Production
The electric hoist is a special lifting equipment, which is installed on the crown block and gantry crane. The electric hoist has the characteristics of small size, light weight, simple operation, convenient use, etc. It is used in industrial and mining enterprises, warehouses, docks and other places.The electric hoist has a compact structure. The electric hoist whose motor axis is perpendicular to the drum axis adopts a worm gear transmission device. Its disadvantages are: large length, large width, bulky structure, low mechanical efficiency, difficult processing, etc. The hydraulic system is of dual control. The overflow regulating valve and magnetic contact pressure gauge can accurately control the pressure. The electrical control department adopts low voltage control, which increases the safety of the control system.