Front axle assembly and assembly method thereof

Abstract

The invention discloses a front axle assembly and an assembly method thereof. The front axle assembly comprises a front axle, a knuckle assembly and a main pin. The main pin of the front axle assembly adopts a structure of upper and lower needle bearings of unequal-diameter structures, the reliability and the stability of the front axle assembly can be obviously improved, the service life of the front axle assembly is obviously prolonged, steering resistance is reduced, the matching surfaces between the main pin and the needle bearings cannot be scratched during assembly and overhauling of the main pin, and a special tool is designed to facilitate assembly; and linings of the needle bearings adopt flanging structures and are assembled in the required direction, loosening of needles is prevented, the number of the assembly parts is decreased, the assembly technology is easy, and the structure is compact. The inner diameters of the upper and lower needle bearings used for the main pin are unequal, the diameter difference is smaller than half of the diameter of each needle bearing, the linings of the upper and lower needle bearings adopt the unilateral flanging structures, the flanging direction is toward the direction that the inner diameters of the needle bearings are decreased, and the two linings of the upper and lower needle bearings are pressed in in the same direction during pressing.

Description

technical field [0001] The invention relates to a front axle assembly and an installation method, belonging to the field of auto parts. Background technique [0002] At present, the upper and lower bushings of the steering knuckle of the front axle assembly of heavy-duty trucks are easy to wear during use, and are gradually replaced by needle bearings. The surface of the needle roller is scratched and worn abnormally, which shortens the service life of the needle roller bearing. At the same time, the needle roller of the needle roller bearing is kept fixed by grease before the assembly. The main pin of the domestic mainstream front axle assembly adopts the locking structure of the lock pin. During use, due to the small locking surface of the lock pin and the large force on the king pin, the king pin is loose and shakes. The possibility of the lock pin can not be realized and the possibility of the lock pin lock nut loosening, which will accelerate the abnormal wear of the k...

AI Technical Summary

Problems solved by technology

[0002] At present, the upper and lower bushings of the steering knuckle of the front axle assembly of heavy-duty trucks are easy to wear during use, and are gradually replaced by needle bearings. The surface of the needle roller is scratched and worn abnormally, which shortens the service life of the needle roller bearing. At the same time, the needle roller of the needle roller bearing is kept fixed by grease before the assembly. The main pin of the domestic mainstream front axle assembly adopts the locking structure of the lock pin. During use, due to the small locking surface of the lock pin and the large force on the king pin, the king pin is loose and shakes. Possibility that the function of the lock pin cannot be realized and the possibility of the lock nut loosening, which will accelerate the abnormal wear of the kingpin and the bushing, and reduce the reliability of the front axle assembly

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