Semi-trailer tractor

　　Semi-trailer tractor

　　There are two ways of connecting tractor and trailer:the first is that the front half of the trailer is on the traction saddle above the rear section of the tractor,and the bridge behind the tractor bears part of the weight of the trailer,which is the semitrailer;The second is the front end of the trailer is connected to the rear end of the tractor,the tractor only provides forward pulling force,pulling the trailer,but does not bear the downward weight of the trailer,which is the full hanging.

　　Different FROM the full trailer,the SEMI-trailer is a trailer with the axle placed behind the vehicle's center of gravity(when the vehicle is evenly loaded)and equipped with a coupling device that can transfer horizontal or vertical forces to the tractor!Generally,there are two shafts for full trailer and one shaft for semi-trailer.Semi-trailer refers to a vehicle that has no power of its own and is jointly carried by the main vehicle and driven by the main vehicle.

　　Briefly,the full trailer is connected to the truck in front by hooks.The semi-trailer is connected with the traction seat of the tractor through the traction pin.The common container transport vehicle is a typical semi-trailer train,and the rear loading part is the semi-trailer.

　　There are also differences in use.Full trailers are mainly used for short-distance transportation in factories,ports,docks,warehouses and other fields,while semi-trailers are mainly used for long-distance transportation of goods.