The air suspension also has some problems in use, and the single point suspension has a certain solution. Today, I summarized some common damage causes of single point suspension.
The function of trailer suspension accessories is to transfer the vertical reaction, longitudinal reaction and lateral reaction of the road surface acting on the wheels and the torque caused by these reactions to the frame. Suspension is the general term of all force transmission connecting devices between the car frame and the axle. Trailer accessories to ensure the normal operation of the car. Automobile suspension generally consists of three parts: elastic element, shock absorber and guide mechanism, which are divided into dependent suspension and independent suspension
1、 Damage to single point suspension caused by residual stress
There will be stress in the semi-trailer accessories, and the semi-trailer axle parts will be subject to external load. Light trailer accessories are respectively normal stress and shear stress. When the external force is removed, the stress left inside is the residual stress. The residual stress will lead to the fracture and additional plastic deformation.
2、 Brittle and ductile fracture
This kind of fracture of semi-trailer fittings is called ductile fracture. The fracture surface of the ductile fracture has obvious plastic deformation. When the part bears the external load, elastic deformation first occurs. When the stress caused by the load exceeds the elastic limit and continues to increase, plastic deformation occurs to the part. When the stress exceeds the strength limit, the axle of the semi-trailer breaks. The color is relatively dark, and sometimes you can see obvious fibers.
3、 Fatigue fracture
The fracture of trailer fittings can be divided into one-time loading fracture and repeated loading fracture Fracture of a part under one static load or one impact load due to one load fracture; Repeated loading fracture, also known as fatigue fracture, refers to the fracture of semi-trailer axle parts after repeated stress or load according to the nature of the load borne by the parts.
