Experts take you to understand the structure of the main axle parts of the truck


Release time:

2022-10-17

The structural form of the main axle parts of the truck, the forged front axle is the main body of the front axle. According to its overall shape, it can be divided into two types: straight type and central sinking type. The sunken front axle can reduce the position of the engine, thereby reducing the center of gravity of the car, which is beneficial to improve driving stability, reduce the height of the cab, reduce the windward area, and improve the aerodynamic performance of the car. For long-cab cars, it can also be broadened The driver's vision. Therefore, the central sunken front axle is widely used, such as the front axle of domestic Jiefang CA10B, Dongfeng EQH0 and other trucks. Because the forging process is simple, it can be used when the general layout of the vehicle allows

The structural form of the main axle parts of the truck, the forged front axle is the main body of the front axle. According to its overall shape, it can be divided into two types: straight type and central sinking type. The sunken front axle can reduce the position of the engine, thereby reducing the center of gravity of the car, which is beneficial to improve driving stability, reduce the height of the cab, reduce the windward area, and improve the aerodynamic performance of the car. For long-cab cars, it can also be broadened The driver's vision. Therefore, the central sunken front axle is widely used, such as the front axle of domestic Jiefang CA10B, Dongfeng EQH0 and other trucks. Because the forging process is simple, a straight front axle can be used where the overall vehicle layout allows.

车桥零部件

Tubular front axle of axle parts: The concave front axle can be divided into I-shaped section and circular section according to its cross-sectional shape and manufacturing process. The I-shaped front axle is mostly cast from W carbon structural steel. Its bending strength is higher and its own weight is smaller. However, the casting process is complex and requires large forging equipment, which is widely used in large automobile manufacturing. The middle part of the front axle of the round pipe section is made of seamless steel pipe, and the two ends are welded with fist-shaped king pin brackets. This front axle is easy to obtain and does not require large forging equipment. Suitable for small and medium-sized car manufacturers. Due to the poor bending capacity of the steel pipe, the size and weight of the front axle section are large, and the material utilization is not reasonable enough. The two ends of the I-shaped section of the front axle are inclined, and the cross-sectional shape gradually changes from I-shaped to square until the two ends are slightly square to improve the torsional strength. Press or weld the copper plate spring bracket at both ends of the upper or lower edge of the front bridge, and install the front leaf spring. In order to limit the steering angle of the front wheels, the knuckles of the fist-shaped part have steering stop protrusions.

The steering knuckle, commonly known as the horn, connects the front axle to the wheels through the king pin to drive the front wheels to turn, thereby realizing the steering of the car. The steering knuckle consists of a flange for fixing the brake backing plate and a knuckle pin for supporting the hub. There are generally three structural forms of the steering knuckle, namely, the integral forging type, the welding type and the bolt connection type. Generally, 40 chrome steel is used, and the shaft is well treated.

The kingpin of the steering knuckle of the axle parts, the kingpin, commonly known as the central pin, has two types: empty and solid. The hollow pin facilitates lubrication. In order to prevent the king pin from rotating, a groove is milled in the cylindrical king pin and locked on the front axle with a wedge pin. Part of this type of king pin is tapered. The taper can be matched with the hole on the front axle to prevent the king pin from rotating, thus eliminating the need for grooves and wedge pins, but the king pin hole on the front axle is more complicated to process.

Simply put, the front wheel hub and hub of the axle parts, commonly known as the flange head, are composed of tapered roller bearings (some passenger cars use single row radial ball bearings).