The Bogie leaf spring is suitable for special and heavy weight semi-trailer , it install with BPW ,FUWA,HJ, L1 Axle.
The Capacity: 24,000 to 32,000 kg . The item total has 17 pcs,the raw material size is 120*14 for frist and second pcs, the third and the fourth is 120*20, others are 120*18. Raw material kind is SUP9.The free arch is 110±3mm,the Development length is 1850, the centre hole is 20.5.

This Item is suitable for BPW Air Suspension Semi-Trailer

1.The Oem number is 991479, the material size is 100*35, the raw material is 51Crv4
2.The Item total has two pcs, first pcs with eye ,use rubber bush(φ30×φ57×102),the length from the centrl of the eye to the centrl hole is 500mm. The second pcs is Z type, the length from the cover to the end is 965mm
3.The height of the spring is 150mm
4.The painting use Electrophoretic painting, the color is drak grey
5.It use with air kit together is the air suspension
6.880534/881386/886150/887701/881339/886118/881508/881381/880319/886117/880315/880368 and so on , we also can produce base on client’s drawings design .

The advantages of the air link spring:

1.Air Spring has excellent nonlinear and hard characteristics, which can effectively limit the amplitude, avoid resonance and prevent impact. The non-linear characteristic curve of air spring can be designed according to the actual needs, which shows that it has a lower stiffness value near the rated load.
2.The Air Spring is easy to be controlled actively because the medium used is mainly air.
3.The stiffness K of the air spring varies with the load p, so the natural frequency w of the vibration isolation system is almost invariable and the vibration isolation effect is almost invariable under different loads.
4.The stiffness of the air spring is adjustable and can be changed by changing the volume of the air chamber or the pressure of the inner chamber. No matter how much load, the air pressure can be changed according to the need to adjust the stiffness of the air spring, or the auxiliary air chamber can be added to increase its volume to reduce the stiffness.
5.For an Air Spring of the same size, different load capacities can be obtained when the internal pressure changes. This enables the same type of air spring to adapt to the requirements of a variety of loads, and therefore good economy. The air spring can bear not only vertical load, but also transverse load and transmission torque.
6.Increasing the total volume of the air spring can reduce the natural frequency of the vibration isolation system, which is a unique advantage of the air spring. In order to reduce the natural frequency of the vibration isolation system, the auxiliary air chamber can be set up, and the auxiliary air chamber can be arranged far away from the air spring. The volume of the auxiliary air chamber increases, that is, the total volume of the air spring is increased, and the natural frequency of the air spring vibration isolation system is decreased.
7.The Air Spring can make use of the height control valve system to keep the working height basically unchanged under different loads. Similarly, through the role of height control valve, so that the air spring in a certain load with different heights, so can adapt to a variety of structural requirements.
8.Air Springs absorb high frequency vibrations and provide excellent sound insulation. The air spring is mainly composed of rubber capsule and air. In the vibration process, the rubber capsule due to expansion, warping, there is very little internal friction, so it is difficult to transmit high-frequency vibration. Air and rubber do not transmit sound easily, so they have good sound insulation. Steel Springs, on the other hand, transmit high frequency vibrations as well as sound.
9.If a throttle hole is arranged between the main air chamber and the Auxiliary Air Chamber of the Air Spring, when the air spring vibrates and deforms, there will be pressure difference between the main air chamber and the auxiliary air chamber. The proper throttle aperture can improve the damping characteristics of the vibration isolation system and effectively suppress the resonance amplitude.
10.Air Springs are lightweight. In addition to the rubber capsule and almost no weight of air, the body is the upper cover and the lower cover, so much lighter than the Leaf spring.