The basic components of electric retractable door that guide pulley and belt drive. Since these three parts and operation of electric retractable door directly related to electric retractable door wearing parts under normal use conditions, structural design, material, machining accuracy, installation and adjustment precision determine its maintenance requirements and life. Life electric retractable door electric components mainly related to improper use and contingencies. For a long Zhaoqing stainless steel electric production and installation of electric retractable door slide design is completely different from the non-electric retractable door slide design. The latter is usually prescribe parallel rails horizontal direction, two (or four) of the pulley through the middle of the connecting member and the suspension is connected to a mobile door, just in between the two rails of the supporting force of gravity to move the door to form a stable "hoisted" This stable structure can achieve good stability and quietness. However, due to rail electric retractable door and door frame fixed to take into account, the door hanging and adjustment, installation and exterior cover of the electrical components installed, and other functions, so the easiest way is to slide design to one side slide, door hanging on the rail on one side by a pulley side, forming the side suspension. The advantage of this design is easy to install and adjust the door, maintenance is also easy. However, this design has many fatal weakness. Therefore the use of such electric retractable door must pay attention to maintenance and maintenance guide pulley and the upper door gap tends to fall, the safety of use can not be guaranteed. So choose this electric retractable door must be noted that wind pressure intensity electric retractable door. This instability is running the drive load changing, affecting life of electrical components greatly. Side suspension structure, door-up support force are in a line, because of the center of gravity of the door mounting accuracy error and wind. The door body is formed not only on the static side dynamic side pendulum swing also produced. To this end. This electric retractable door door lower portion of the guide block, commonly known as "bracing block" on the use of a bearing, bearing a smaller diameter than the lower part of the door guide groove, so that the door can still be run in both directions swinging conditions. This side of the pendulum vibration generated effect on the performance of the noise, the consequences will inevitably lead to a pulley and rail wear.