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Heavy truck spur gears are core adaptive components in the parallel shaft transmission system of heavy trucks, mainly used in key assemblies such as gearboxes and drive axles. With the transmission characteristics of parallel shaft meshing, they realize stable power transmission and torque amplification. Their adaptation accuracy is directly related to the power response and driving stability of heavy trucks in heavy-load transportation. Different from other types of heavy truck gears, heavy truck spur gears need to focus on optimizing the tooth profile modification design to offset the edge contact stress caused by shaft system deformation under heavy-load conditions and avoid increased local wear on the tooth surface.
In terms of materials and processes, heavy truck spur gears are mostly made of high-strength alloy structural steel, which undergoes isothermal quenching and precision gear grinding. This not only ensures high hardness and wear resistance of the tooth surface but also improves core toughness, which can effectively cope with frequent load fluctuations and impacts during long-distance transportation of heavy trucks. According to the transmission needs of different power assemblies of heavy trucks, heavy truck spur gears will be calibrated with differentiated addendum height coefficients and pressure angles to ensure precise matching with transmission shafts, bearings and other components, reducing energy loss and operating noise during power transmission.
In the selection and operation and maintenance links, it is necessary to select heavy truck spur gears of corresponding specifications according to core parameters such as the load level and engine power of the heavy truck, to avoid tooth breakage or deformation caused by the tooth surface load exceeding the rated range. In daily maintenance, in addition to regularly replacing special gear oil suitable for heavy-load conditions, it is also necessary to regularly detect the iron spectrum content in the oil to judge the tooth surface wear status of heavy truck spur gears; at the same time, clean the gearbox vent to prevent abnormal internal pressure from affecting the sealing effect, ensuring the long-term stable operation of heavy truck spur gears.
