Full load body frame In recent years, more and more domestic passenger car companies are using this technology to produce safer and more fuel-efficient passenger cars with the increasing popularity of full load bearing technology, increased requirements for the rating of passenger cars, and frequent traffic accidents.
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The advantages of full-loaded body
"Unlike semi-loading, the undercarriage that fully supports the car body is not a stamped and riveted frame type structure, but a latticed structure made up of rectangular tubes. The characteristics of a full-loaded car body is that the car has no frame and the car body serves as an engine. The chassis of the chassis and the assembly of each chassis.†Yan ZJ, head of the body room of the Suzhou Jinlong Bus Technology Center, said that in this case, all kinds of loads on the car are carried by the car body. This design enables the entire body to participate in the load. . Because the upper and lower structures form an integral body, the entire body shell reaches a stable equilibrium when subjected to a load.
For the passive safety and fuel economy of all-passenger buses, Yan Zhuren said that because the body is a one-piece grille structure, the entire vehicle can quickly disperse forces throughout the vehicle body when subjected to forces. Therefore, the passenger car is fully loaded. The passive safety performance is better. According to the European passenger car passive safety test, in the event of a passenger car accident, especially in the case of rolling and collision, this structure is not easily deformed and can ensure the safety of passengers in the vehicle to the greatest extent; on the other hand, it adopts full load bearing. Passenger cars with structural bodies have 500-700 pounds less weight than passenger cars with semi-bearing structures. Therefore, all-passenger coaches are also characterized by high fuel economy.
Because of these characteristics, since last year, Suzhou Jinlong Haeger Bus has adopted a full load-bearing structure on the road passenger car. According to report, Yutong, Dajinlong, Futianou V and other bus companies also started to use full-loaded bodywork on some passenger cars, while Ankai said that the passenger cars that are currently produced use full load-carrying bodies; Zhongtong Bus not only adopts full load bearing. The body has also won national invention patents for all-car body.
The advantages of the semi-bearing structure car are difficult to replace
Although the full-loaded car body has been adopted by more and more bus companies with its own characteristics, there are also some bus company technical personnel who believe that the semi-loaded car body has its unique features and that it is impossible for a full-capacity bus to completely replace the semi-carriage passenger car.
According to a body engineer of the Yutong Bus Technology Department, the semi-bearing body is a structure between the non-bearing body and the load-bearing body. It has an independent and complete frame, and the frame is rigidly connected with the body, so the body The shell can withstand partial loads. “The semi-bearing body is characterized by the rigid connection of the body and the frame with screws, riveting or welding. In this case, the body of the car not only bears various loads on the car, but also contributes to a certain extent. Reinforce the frame and share part of the frame load."
Speaking of all the above advantages of the full-loaded car body, the engineer said that he is not very much in favor of it: "Those advantages are still some theoretical things. At present, more experimental data are needed to demonstrate and confirm."
And Wan Chung, Chief Engineer and Technical Center Director of Chongqing Hengtong Bus, also said that although it is only a transitional structure, the semi-loaded body structure also has its own advantages. For example, the structure is simple and it is easy to modify the vehicle. Especially after accidents occur in the vehicle, the semi-loaded vehicle body can be easily maintained. On the other hand, since the semi-loaded vehicle body part participates in the bearing function, the strength and rigidity of the bottom frame can be weakened to a certain extent. Therefore, the semi-loaded body can also reduce the self-weight of the vehicle to some extent.
"The most important thing is that half-carrying passenger cars are cheaper than fully-carrying passenger cars. Given this factor, there are still many customers who are willing to purchase passenger cars with semi-loaded body structures." It is understood that. At present, Hengtong has not applied full load bearing technology to passenger cars.
The semi-loaded body is a structure between a non-loaded body and a load-bearing body. He has an independent and complete frame, and the frame is rigidly connected with the body, so the body shell can take part of the load. Semi-loaded body is generally used for buses.
Extended reading:
The full-load body technology can be vividly called "birdcage structure" and has always been applied to the integrated manufacturing technology of the aircraft manufacturing industry. The traditional passenger car shifts when it is impacted, and because of the chassisless structure of the full-load passenger car, it can quickly break down the force to various parts of the body when it is subjected to force. At the same time, the strength of the steel equipment that is fully resistant to twisting the passenger car is also strong. 3-6 times that of other ordinary cars. It can be said that the full-capacity passenger car is one of the safest passenger cars in China. Adopting a full load bearing structure, the passenger car has more agility, stability, comfort and safety, coupled with its low floor design, humanized configuration, low emission, environmental protection, passenger space and other advantages, reflecting the modern The social advocacy of "leading technology, people-oriented" concept has also created the unique product advantages of all-cars.
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