Curtain Wall,Aluminium 150 Curtain Wall,Powder Coated Curtain Wall,Anodized Curtain Wall Profile FOSHAN WINKAI ALUMINIUM CO.,LTD , https://www.wkaluminum.com
The rear rocker arm , an important role that bears the connection between the rear wheel and the frame , is often the object of neglect when the user chooses the car. It seems that only four fixed points are connected. At the beginning of the design, the manufacturer needs to spend a lot of time designing the rear rocker . 
From the length and width angle to the material selection, each place affects the dynamic performance of the vehicle. The rocker arm needs to bear the forward driving force brought by the rear wheel when accelerating, and the drag force brought by the braking, can guarantee the stability of the rear wheel.
The type of rocker arm of different shapes and materials also affects the stability of the body during driving. Some unnecessary vibrations are absorbed and filtered by the rocker arm .
7 common rear rocker structures
1. Round tube rear rocker 
The round tube rear rocker arm is called the originator design. The main representative model is Cafe. In those days, there was no design concept for the rocker arm , which believed that it could provide a strong connection between the frame and the rear wheel. Will suffice. 
Since the density of the raw materials is not enough to achieve good support ability, the rear shock absorber needs to be installed close to the wheel axle position, and the force of the rocker arm after the distribution of the round pipe brings another problem. Such precise adjustment results in uneven force on the body and cannot guarantee the stability of the rear wheel. 
With the advent of various events, it was discovered that the rocker arm was cautious on the vehicle, and few vehicles used this design. It is now common in retro-modified cars.
Second, the square tube rear rocker 
Compared with the round tube rear rocker arm , the square tube rear rocker arm changes the rear shock absorption position, from the original double tailed rear shock absorption to the central shock absorption. Avoid the tilting of the body to the left and right, and there are more ways to install the shock absorber. This design method has been used today. 
However, there are still some shortcomings, that is, the use of the most ideal manufacturing materials, in the face of heavy-duty vehicles can not guarantee sufficient support and stability. 
However, its use is the highest and the cost is low. To this day, most displacement models still use this design.
Third, square tube type rear rocker 2.0 version (enhanced type) 
This is an upgraded version based on the first generation of square tube rear rocker arm . The square tube is superimposed on the original square tube to make the rocker arm form a triangular structure. 
From the point of view of mechanics, it is indeed possible to distribute the anti-stress more evenly and ensure the stability of the car body. In the past, it became the design of most sports cars.
Every part of the body has its meaning.