Where is the second-hand electric vehicle trading market in Lanzhou?

Caojiaying, you can go to the same city websites of Lanzhou University, such as May 8th City, Jiji.com and People.com, and have a look. There is a lot of information about buying and selling second-hand electric vehicles in Lanzhou.

The quality of the frame directly determines the safety performance of the whole vehicle. Here are several ways to verify the framework. First, observe the welding level of the frame inside the plastic parts of the vehicle. If there is virtual welding or desoldering, the quality of the frame is not ideal.

Observe the rack for signs of rust.

Because the frame needs a process called electrophoresis to prevent rust, many frame manufacturers simply don't spray black paint by electrophoresis to control costs. If the new car has rust problems, it means that the electrophoretic quality of the frame is abnormal. Finally, test drive, drive at high speed and then suddenly brake to see if the frame shakes left and right. If it shakes badly, it means that the quality of the frame is not up to standard and there is a safety hazard.

Although there are many kinds of vehicles, their structures are similar. This should be said to be the credit of standardization and the need of large-scale production line. With the development of society, the progress of science and technology and the change of demand, the appearance of railway vehicles has also begun to change, especially the passenger cars are no longer the same old faces. However, their basic structure has not changed obviously, but the specific parts have more scientific and advanced structural design.

Generally speaking, the basic structure of a vehicle consists of five parts: body, underframe, running gear, coupler buffer device and braking device.

The car body is the part of the vehicle carrying goods or passengers, and it is also the basis for installing and connecting other parts of the vehicle. The bodies of early vehicles were mostly wooden structures, supplemented by steel plates and bow bars. Modern automobile body is mainly steel structure or light metal structure.