Advantages of middle axle trailer:
1. Longer vehicle length and additional loading.
According to GB 1589-2016 "Automobile, Trailer and Automobile train outer dimension, axle load and mass limit", the length limit of train transported by vehicles with middle axle is 22 meters. It should be known that the length limit of a semi-trailer is 13.75 meters and the length limit of container semi-trailer is 13.95 meters, which is 5 meters more than the length of a hinged train. Don't underestimate the 5 meters, used for cargo transportation, but not a tiny space.
2. The vehicle chassis is lower.
Top semi trailer manufacturers claimed The power of a mid-axle trailer comes from the chassis of the vehicle in front of it, and its tow hook is normally set on the chassis of the vehicle in front, which is lower in height than the traction pin of a semi-trailer. A short chassis, a lower center of gravity, the vehicle is more stable, the operation safety is better, in the case of steep ceiling of the road, the vehicle is stronger. For mid-axle coupes, the low chassis means you can stack double rows up and down for additional capacity.
3, bend through the strong.
The wheels of the middle axle trailer are in the middle of the carriage, thus the wheelbase is shorter and the turning radius is smaller. When it comes to a relatively tiny corner, the semi-trailer can't turn over, but the middle axle trailer may turn over. Therefore, a mid-axle trailer can be made longer for the same turning radius.
Disadvantages of middle axle trailer:
1. Strong requirements for road conditions.
Mid-axle trailers have a lower chassis. Although they have advantages on steep-limit roads, at the same time, the low chassis can easily cause the vehicle to be unable to adapt to bad road conditions.
2. The price is on the high side.
Compared with the semi trailer, the cost of using the middle axle trailer is higher. For example, if the semitrailer bucket is broken, it can be directly replaced with a fresh bucket, but the front of the middle axle trailer and the bucket are matched, and the matching must be considered if you want to modify the car.
3. The product is not mature enough.
The wheels of the middle axle trailer are in the middle of the carriage, and it is easy to swing up and down or around when running, which affects the smoothness of the vehicle to a certain extent. In addition, there is nearly no gap between the front car and the cargo car of the middle axle trailer. Once the front car needs to brake, the rear car will push forward due to inertia. If there is a fierce collision, the cab can not move back, and the safety is worrying.
4. More difficult to drive.
The required license type for a mid-axle trailer is A2. Although it is claimed that the middle axle trailer chassis is low and the wheelbase is short, in practical application, numerous owners have reflected that "it is necessary to have some technology to open", "it is too difficult to turn", "it is definitely a master to open", "it has been shaking" and so on.
At present, the middle axle trailer is still in the car, express and other fields of application. In the field of general goods transportation to accept and popularize, I am afraid there is still a long way to go.