The main beam of a truck is the core load-bearing structure that directly determines the stability, driving safety, and service life of the vehicle. Overseas construction sites have heavy loads, bumpy road conditions, and complex road conditions. Long term overloading, impact, and collision of vehicles can easily lead to problems such as bending, twisting, sinking, and deformation of the beam. Many fleets only focus on the engine and tire status in their daily lives and ignore beam detection. When there is deviation, tire eating, and frequent damage to the tilted parts of the vehicle body, the deformation of the beam is discovered. At this time, the maintenance cost is extremely high and cannot be fully restored to the original factory state. Mastering a simple and non-destructive beam detection method can help overseas users quickly identify hidden dangers and avoid major faults in advance. Firstly, the vehicle can be parked on a flat and hard ground using visual inspection to ensure that the body is unloaded, upright, and the whole vehicle can be If a certain section of the beam is found to be arched, concave, bent, welded, cracked, and the paint surface bulges and falls off, it is highly likely that there is a problem of force deformation. At the same time, observe the symmetry of the frame in the front, back, left, and right directions, check whether there is any offset, skewness, or asymmetry in the fixing position of the driver's cab bracket steel plate base suspension. Secondly, use the horizontal comparison method to quickly detect the height difference. Stop the vehicle on a horizontal ground and measure the height of the left and right beams from the ground. The distance between the front and rear fixing points from the ground is normal. The height difference between the left and right sides of the vehicle is consistent. If one side is low or the height difference between the front and back is obvious, it indicates that the beam has sunk, twisted, and deformed. This situation will directly cause the vehicle to deviate from the The sentence is: According to the normal four-wheel data of a vehicle, the symmetry error is extremely small. If there is a large deviation in the data, it indicates that the displacement and deformation of the main beam or suspension base belong to structural damage. The fourth observation is the fitting state of the accessories to assist in determining the deformation of the main beam, which will also change the installation angle of the suspension steel plate spring balance axis cargo box fixed support. The normal fitting of the accessories is tight and the gap is uniform. Once the steel plate tilt support is found to be misaligned, the cargo box is in close contact while the suspension chassis accessories are in asymmetric clearance. It can be basically determined that the main beam has been impacted and deformed. Many overseas customers easily ignore the slight deformation of the main beam. Continuing heavy load operations will cause abnormal wear of all chassis accessories, unstable braking, driving shaking, and a significant increase in the risk of heavy load rollover. It cannot be Professional equipment is required to quickly troubleshoot issues such as beam distortion, sinking, bending, and other problems. Pre screening of vehicles with poor condition is necessary to prevent operations with defects, effectively reducing fleet operation risks and long-term operating costs
