When it comes to long head semi-trailer, many people first think of models from western countries, such as the famous Optimus Prime Peter Bildt 389, which is a typical long head semi-trailer. In contrast, the market share of long head semi-trailer in China is relatively small, mainly flat head semi-trailer.

One of the most important reasons is the restriction on the length of semi-trailer in laws and regulations. In the past, the regulations required that the total length of the semi-trailer should not exceed 17 meters, of which the carriage accounted for 13 meters, and the maximum length left for the tractor was only 4 meters, so the engine had to be moved under the cab.

However, with the introduction and implementation of the new national standard gb1589, the length limit of long head hinged train has been relaxed to 18.1 meters, an increase of 1 meter, which makes more space for the tractor of long head semi-trailer to a certain extent. Car owners can transport goods with long head semi-trailer without losing the length of carriage.

Is it worth starting with the "green license" of semi-trailer? This also starts from the advantages and disadvantages of long head semi-trailer itself.

Main advantages of long head semi-trailer:

1. Better safety performance: compared with the flat head semi-trailer, a "long nose" is designed in front of the long head semi-trailer, so there is an additional buffer zone of about 2 meters. If there is an accident, the cockpit is not easy to deform and roll over, so as to protect the driver's safety. This is one of the reasons why Chinese and foreign school buses choose the "long nose" model.

2. Better driving comfort: since the vehicle engine is changed from the lower part of the cockpit to the front of the cockpit, when the vehicle is driving, the noise in the cab is less, the vibration is less, and the driving comfort is stronger.

3. More fuel-efficient: the front design of long head semi-trailer is relatively special, which can reduce air resistance when driving. To a certain extent, it is more fuel-efficient than flat head semi-trailer. Especially under the background of rising fuel prices, it can help car owners save a lot of money.

4. More convenient maintenance: the use and maintenance of long head semi-trailer is more convenient. It is much more convenient to open the engine cover during maintenance, which is much more convenient than turning over the cab during maintenance of flat head semi-trailer.

Everything has its advantages and disadvantages, and long head semi-trailer is no exception. Next, let's talk about the disadvantages of long head semi-trailer:

1. The driver is not used to driving a semi-trailer for a long period of time, especially if the driver is used to driving a semi-trailer for a long period of time.

2. Inflexible turning: due to the longer tractor head, the turning radius of long head semi-trailer is larger. Therefore, when turning or turning, it is not as flexible as flat head semi-trailer, which makes it more difficult to drive. Especially in China, the traffic conditions are relatively crowded. For example, the roads in Southwest China are relatively narrow, which is not suitable for the use of long head semi-trailer. This is also the reason for the large share of flat head semi-trailer in China and European countries.

3. Higher body weight: the tractor length of long head semi-trailer is longer, so its own weight is also heavier. This is also a fact. It is not a small constraint on the premise of the total weight limit of transport vehicle.

4. Higher price: in terms of manufacturing cost, the price of long head semi-trailer is higher than that of flat head semi-trailer, and the change of model means more input cost.

To sum up, although the length of long head hinged train is relaxed in gb1589, the development prospect of long head vehicle still needs to be objectively and comprehensively analyzed and understood. Under the condition of China's highway transportation, flat head vehicle is more suitable for China's basic situation, and the development of long head vehicle still has a long way to go.

No matter what kind of semi-trailer owners choose, they should pay attention to the selection and screening of axles. Shandong Darong group is one of the earlier axle enterprises in China and one of the first axle enterprises to mass produce integrated axles in Liangshan special vehicle production base. It has a series of products such as disc axle, drum axle, low flat axle, special axle, concave axle and three-line six axle axle axle. With reliable quality and real price, it helps car owners save energy and increase efficiency.