The on-board part of lowbed semi-trailer has no breast board and is widely used. It is mainly used for medium and long-distance freight transportation. The frame of series semi-trailer is of through beam structure, and the longitudinal beam adopts flat and movable gooseneck type. The web height is from 400 mm to 550 mm, the longitudinal beam is welded by automatic submerged arc welding, the frame is shot blasted, and the transverse beam penetrates into the longitudinal beam and is welded as a whole. It is composed of series dry plate spring and suspension support. It has reasonable structure and strong rigidity and strength. It is used to support load and slow impact. Low flat semi trailers are usually used to transport heavy vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machines, forestry machines, agricultural machines (such as excavators, bulldozers, loaders, pavers, cranes, etc.) and other heavy goods. The lower the center of gravity, the better the stability and safety, The stronger the ability to transport ultra-high goods and pass overhead obstacles. 3 Axles Lowbed Trailer,Lowbed Trailer 250 Ton,3 Axle Lowflat Bed Semi Trailer,3 Axles Lowbed Truck Trailer Shandong Chengda Auto Sales Co., Ltd. , https://www.chengdasemitrailer.com
2. The timer can automatically control the state of the door. The principle is to connect the clock to a specific switch circuit, and the automatic door can be automatically opened or locked in a preset time.
3. The lock motor is used for heavy-duty automatic sliding doors. The electronic locks of automatic swing doors are electromagnetic door stoppers, electronic latch locks and electronic door openers. The direction of the force of the electronic door opening does not affect the opening movement of the door and is not prone to misoperation. There is also a mechanical lock with a contact switch, so that the lock is combined with the switch, the lock is not in the unlocked state, the contact cannot be contacted, and misoperation may not occur.
4. Inductive signal generators can be used to signal when the sensor detects that the door is in a certain position. When the corresponding indicator is set in the central control room, the state of the automatic door can be displayed, and the centralized operation usually means that multiple doors are opened or locked at the same time, depending on whether there is a corresponding terminal on the automatic door controller.
Automatic door operation steps
1. The key switch is conveniently called a toggle switch. The elbow contact switch is very durable, especially it can be operated with elbows. Avoid hand contact.