Steyr series heavy trucks choose different types of automobile transmission shafts according to different driving forms. Generally speaking, 4 × 2. The drive car has only one main transmission shaft. six × 4. The vehicle with transmission type is composed of intermediate transmission shaft, main transmission shaft and middle and rear axle transmission shaft. six × The car with 6-drive type has not only the middle transmission shaft, main transmission shaft, middle and rear axle transmission shaft, but also the front axle transmission shaft. The middle transmission shaft of long wheelbase vehicles is generally equipped with the middle support of the transmission shaft. It is composed of support frame, support and rubber support.

The transmission shaft is composed of shaft tube, expansion sleeve and universal joint. The telescopic sleeve can automatically adjust the distance between the transmission and the drive axle. The universal joint ensures the change of the included angle between the transmission output shaft and the drive axle transmission shaft, and realizes the constant angular speed transmission of two shafts. Universal universal joint spider, spider and flange fork, etc. The transmission shaft universal joint used in Steyr series heavy vehicles adopts roller cross shaft bearings, and is equipped with a short and thick cross shaft, which can transmit a larger rotation distance. The end face of the bearing is equipped with a butterfly spring, which is used to tighten the roller. Reinforced nylon gasket with spiral groove is added to the end face of the spider to prevent sintering during power transmission with large angle or large rotation distance.

The traditional structure of the transmission shaft telescopic sleeve is to weld the spline sleeve and the flange fork together, and the spline shaft is welded on the transmission shaft tube. The transmission shaft of GWB company has changed the traditional structure by welding the spline sleeve and the transmission shaft tube into one, and forking the spline shaft and flange into one. The rectangular spline is changed into involute short tooth spline with large pressure angle, which not only improves the strength, but also facilitates extrusion forming, and meets the needs of high torque working conditions. A layer of nylon is coated on the tooth surface of the telescopic sleeve and spline shaft, which not only increases the wear resistance and self lubrication, but also reduces the damage of impact load to the transmission shaft and improves the cushioning capacity.

This type of transmission shaft adds a tubular sealing protective sleeve on the outside of the French key shaft, and two polyurethane rubber oil seals are set at the end of the protective sleeve, so that a fully sealed factory space is formed in the telescopic sleeve, so that the telescopic spline shaft is not eroded by external sand and dust. It is not only dust-proof, but also rust proof. Therefore, the spline shaft and sleeve are coated with grease at one time during the assembly process, which can fully meet the use requirements, and there is no need to install grease nipples for lubrication, reducing the maintenance content.

Automobile transmission shaft is a rotating body with high speed and less support, and its dynamic balance is very important. Generally, the transmission shaft must undergo dynamic balance test and be adjusted on the balancer before leaving the factory. Therefore, a set of transmission shafts shipped from the factory should be paid special attention in use.