The composition of the electric retractable door
电动伸缩门的组成结构
1. Telescopic door body
1、伸缩门体
The door body of the electric telescopic door is composed of the main components such as the large frame of the door body, the cross support, the shaft (fixed shaft, sliding shaft) and the door wheel.
电动伸缩门的门体是由门体大框、交叉撑、轴（定轴、滑轴）及门体轮等主要部件组成。
The whole door body is a metal structure, according to the material is divided into stainless steel door body, aluminum alloy door body, die-cast aluminum door body.
门体整体为金属结构，按材质又分为不锈钢门体、铝合金门体、压铸铝门体。
2, the head
2、机头
The head is composed of a driver and an electrical part, which is fixed at one end of the door body to drive the telescopic movement of the door body and is used with the door body.
机头是由驱动器和电气部分组成，它固定在门体的一端，带动门体伸缩运动，与门体配套使用。
The drive (motor) adopts the turbine worm motor chain or gear transmission mode, the chain transmission is a scientific and conventional design structure, the dynamic balance of the electric telescopic door has a long service life, easy maintenance, and low failure rate is the technical form adopted by most enterprises on the market, and the gear transmission mode is mostly forged steel plate chassis, the chassis weight is light, so the traction is weak;
驱动器（电机）采用涡轮蜗杆电机链条或齿轮传动方式，链条传动为科学常规的设计结构，电动伸缩门的动行平衡使用寿命长，易于养护，故障率低固为市场上绝大部分企业采用的技术形式，齿轮传动方式多为钢板锻造底盘，底盘重量较轻，因此牵引力较弱；
Gear transmission needs to be able to play an effective role under the oil-immersed closed state, otherwise the future maintenance cost is higher.
齿轮传动需要在油浸封闭的状态下方能发挥使用效力，否则日后维修保养成本较高。
The motor chooses the size of the power according to the length of the door row, the long length of the door row generally needs to choose the motor with high power, the price of the motor, the greater the power, the higher the price.
电机根据门排的长度来选择功率的大小，门排长度长的一般需选择功率大的电机，电机的价格，功率越大，价格越高。
The electrical part (bottom plate) is customized according to the width of the telescopic door, the main role is to fix the motor and drive wheel, and increase the traction for the door row.
电气部分（底板）是根据伸缩门的宽度来定制的，主要作用的是固定电机和驱动轮，为门排增大牵引力。
3. Controller
3、控制器
