Structural Characteristics of Automotive Drive Shaft
The car drive shaft is an indispensable part of the car. Just like a human can't have no arm, the car drive shaft is composed of a shaft tube, a telescopic sleeve and a universal joint. The telescopic sleeve automatically adjusts for changes in the distance between the transmission and the transaxle. The universal joint is to ensure the change of the angle between the transmission output shaft and the input shaft of the transaxle, and realize the two-axis isometric transmission. General universal joint cross shaft, cross bearing and flange fork. The drive shaft universal joints used in the Steyr series of heavy-duty vehicles use roller cross-shaft bearings with a short, thick cross shaft that transmits a large torque. A butterfly spring is provided on the end face of the bearing to press the roller. A reinforced nylon gasket with a spiral groove is added to the end face of the cross shaft to prevent sintering when a large angle or a large torque is transmitted.
The transmission shaft adds a tubular sealing protective sleeve outside the flange spline shaft, and two urethane rubber oil seals are arranged at the end of the protective sleeve, so that a completely sealed space is formed in the telescopic sleeve, so that the telescopic spline is made. The shaft is free from dust from the outside and is not only dust-proof but also rust-proof. Therefore, in the assembly, the grease is applied to the spline shaft and the sleeve at one time, which can fully meet the requirements of use, without the lubrication of the nozzle, and the maintenance content is reduced.
The drive shaft is a high-speed, low-supporting rotating body, so its dynamic balance is crucial. Generally, the drive shaft must be tested for dynamic balance before leaving the factory and adjusted on the balancer. Therefore, a set of drive shafts are factory-equipped and should be paid special attention during use.
Heavy-duty trucks choose different types of drive shafts depending on the type of drive. In general, a 4x2 drive type vehicle has only one main drive shaft. The 6×4 drive type has an intermediate drive shaft, a main drive shaft and a center and rear axle drive shaft. The 6×6 drive type has not only the intermediate drive shaft, the main drive shaft and the middle and rear axle drive shafts, but also the front axle drive drive shaft. In the middle of the long wheelbase vehicle drive shaft is generally provided with the intermediate support of the drive shaft. It consists of a support frame and a support. The conventional transmission shaft sleeve is welded with the spline sleeve and the flange fork, and the spline shaft is welded to the transmission shaft tube. The transmission shaft of GWB company changed the traditional structure, and the spline sleeve and the transmission shaft tube were welded together, and the spline shaft and the flange fork were integrated. The rectangular tooth spline is changed into a large pressure angle involute short tooth spline, which not only increases the strength but also facilitates extrusion forming, and is suitable for the needs of large torque working conditions. The surface of the teeth of the telescopic sleeve and the spline shaft is entirely coated with a layer of nylon material, which not only increases the wear resistance and self-lubricity, but also reduces the damage of the impact shaft to the drive shaft and improves the buffering capacity.