Structural characteristics of drive shaft accessories

Steyr series of heavy-duty trucks choose different types of drive shaft accessories according to different drive forms.Generally speaking, a 4×2 drive type car has only one main drive shaft. The 6×4 drive type automobile has an intermediate drive shaft, a main drive shaft, and a middle and rear axle drive shafts. A 6×6 drive type automobile not only has an intermediate drive shaft, a main drive shaft, and a middle and rear axle drive shafts, but also a front axle drive drive shaft.The intermediate transmission shaft of long-wheelbase vehicles is generally provided with a transmission shaft intermediate support.It is composed of support frame, bearing and rubber support.
        The drive shaft accessories are composed of a shaft tube, a telescopic sleeve and a 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 angle between the output shaft of the transmission and the input shaft of the drive axle, and realizes the constant angular velocity transmission of the two shafts.Generally, it is composed of universal joint cross shaft, cross bearing and flange fork.The universal joint of the drive shaft used in the Steyr series of heavy-duty vehicles adopts roller cross shaft bearings, combined with a short and thick cross shaft, which can transmit a larger torque.A butterfly spring is provided on the end face of the bearing to compress the roller.A reinforced nylon gasket with spiral grooves is added to the end of the cross shaft to prevent sintering when the power is transmitted with a large angle or a large torque.
        In the traditional structure of the transmission shaft telescopic sleeve, the spline sleeve and the flange fork are welded together, and the spline shaft is welded to the transmission shaft tube.The transmission shaft of GWB Company changed the traditional structure, welded the spline sleeve and the transmission shaft tube into one body, and made the spline shaft and the flange fork into one body.The rectangular tooth spline is changed to a large pressure angle involute short tooth spline, which not only increases the strength but also facilitates the extrusion forming, and meets the needs of high torque working conditions.The tooth surface of the telescopic sleeve and spline shaft is coated with a layer of nylon material, which not only increases the wear resistance and self-lubricity, but also reduces the impact load on the drive shaft and improves the cushioning capacity.
        This type of transmission shaft adds a tube-shaped sealing protective sleeve outside the flange spline shaft. Two polyurethane rubber oil seals are set at the end of the protective sleeve to form a completely sealed space in the factory to make the telescopic spline The shaft is not corroded by external sand and dust, and is not only dust-proof but also rust-proof.Therefore, when assembling, apply grease to the spline shaft and the sleeve at one time, which can fully meet the requirements of use, and there is no need to install a grease nipple for lubrication, reducing maintenance content.
        The drive shaft accessory is a high-speed, low-supported rotating body, and its dynamic balance is very important.Generally, the drive shaft must undergo a dynamic balance test before leaving the factory and be adjusted on a balance machine.Therefore, a set of drive shafts are delivered as a complete set, so special attention should be paid to them during use.