Mining areas and infrastructure construction sites have many gravel pits and bumpy roads, and vehicles travel under heavy loads and bumps for a long time. Steel plate springs are one of the fastest worn chassis components. Many overseas fleets experience problems such as steel plate breakage, inter piece looseness, arch collapse, and shock absorption failure, most of which are not due to component quality issues, but rather abnormal wear and tear caused by improper operation and lack of daily protection in gravel road conditions. Once fatigue damage occurs to the steel plate spring, it can cause the vehicle body to tilt, the load to be unbalanced, and the tires to wear unevenly, seriously affecting driving stability and increasing the cost of downtime maintenance. Mastering standardized driving and maintenance techniques can effectively extend the service life of steel plate springs and reduce fleet maintenance costs.
Eliminate high-speed potholes and bumps, and reduce instantaneous impact loads. The gravel road surface is covered with potholes, gravel, and raised hard ridges, and many drivers are driving at high speeds to meet the construction deadline. When a vehicle is overloaded and crushed on a pothole at high speed, the chassis instantly bears a huge impact force, and the steel plate spring is overloaded and compressed, which is prone to fatigue and hidden cracks. Long term repeated impact can directly lead to plate breakage. Construction site vehicles should adhere to low-speed and uniform traffic, avoid deep pits and large protruding sand and gravel in advance, and avoid forcefully rushing over ridges or crossing pits at high speeds to reduce the impact loss of steel plates from the source.
Overloading and unbalanced driving are strictly prohibited to avoid uneven stress on steel plates. Overloading, uneven loading of goods, and one-sided loading are common issues in construction site operations, which are the core causes of steel plate spring collapse and fracture. Overloading of vehicles will exceed the rated bearing limit of steel plates, resulting in rapid attenuation of steel plate arch and elastic failure; Unbalanced loading of goods can cause uneven stress on the left and right steel plates, resulting in long-term overloading of one side of the steel plate, leading to unilateral collapse and vehicle tilting. Daily loading requires uniform weight distribution, strict control of rated load capacity, elimination of long-term unbalanced and overloaded operations, ensuring balanced stress distribution of steel plates, and delaying fatigue aging.
Standardize the starting brake operation to avoid chassis jolting and damage. Under heavy load conditions, aggressively pressing the accelerator to start or applying emergency brakes can cause the vehicle to experience severe jolts. The steel plate springs are instantly subjected to tensile and compressive stress, exacerbating the wear of the body and the aging of the rubber sleeve. The poor adhesion of gravel road surface can easily cause wheel slippage during rapid acceleration, leading to uneven stress on the chassis and further exacerbating steel plate wear. Construction site driving requires a smooth start, slow braking, maintaining a steady speed, reducing chassis impact, and minimizing abnormal fatigue of steel plate springs.
Carry out daily inspections and maintenance, and promptly identify hidden dangers. The sand and gravel road has a lot of dust and gravel, which easily gets stuck between the steel plate spring plates. When the vehicle bumps, the gravel repeatedly rubs against the plate body, causing wear, scratches, and sticking of the steel plate, which eventually leads to fracture. Daily maintenance requires regular cleaning of gravel and dust in the steel plate interlayer, checking the tightening status of steel plate lifting ears, clamps, and U-screws to prevent steel plate displacement and force deviation caused by loose screws. At the same time, check the status of the steel plate liner and shock absorber. Failure of shock absorber will double the amplitude of steel plate vibration, accelerate aging and wear. If any faults are found, they should be replaced in a timely manner.
In summary, the core of protecting steel plate springs for sand and gravel road surfaces on construction sites lies in maintaining stable speed, avoiding potholes, strictly controlling load, smooth operation, and regular maintenance. Abandoning the habit of violent driving on construction sites and maintaining the foundation of the chassis can significantly reduce abnormal faults such as steel plate spring breakage, collapse, and wear, reduce the frequency of chassis maintenance, ensure stable attendance of vehicles in complex construction site conditions, and help overseas fleets reduce costs and increase efficiency.
