Automobile transmission shaft is composed of shaft tube, telescopic sleeve and universal joint. The telescopic sleeve can automatically adjust the change of 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 speed transmission of the two shafts.

Universal joint is the key component of automobile transmission shaft. On rear wheel drive vehicles, the universal joint transmission shaft is installed between the transmission output shaft and the drive axle input shaft; For front wheel drive vehicles, the transmission shaft universal joint is omitted and installed between the front axle and the wheel, which is responsible for both driving and steering. A car is a moving object. On the rear drive vehicle, it is installed on the frame as a whole, and the drive axle is connected to the frame through an elastic suspension. There is a distance between the two, which needs to be connected.

When the vehicle is running, the uneven road surface will produce runout, the load change or the installation position difference of the two assemblies will change the included angle and distance between the transmission output shaft and the drive input shaft. Therefore, a "variable strain" device should be used to solve this problem, so there is a universal joint.

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.

Xingtai YUANTUO Auto Parts Manufacturing Co., Ltd., founded in 1990, is a manufacturer specializing in the production and sales of transmission shaft support and torsion bar rubber core. Today, Xiaobian will tell you about the precautions for the use of the transmission shaft. We all know that the maintenance of the machine can prolong its service life, and the transmission shaft is the same:

1. It is strictly forbidden to start the car with high gear.

2. Do not lift the clutch pedal violently.

3. It is strictly forbidden to overload or overspeed the vehicle.

4. Always check the working condition of the transmission shaft.

5. Always check the fastening of the transmission shaft hanger, whether the supporting rubber is damaged, whether the connecting parts of the transmission shaft are loose, and whether the transmission shaft is deformed.

6. In order to ensure the dynamic balance of the transmission shaft, always pay attention to whether the balance welding strip is desoldered. The new drive shaft assembly is provided as a complete set. When loading the new drive shaft, pay attention to the assembly mark of the expansion sleeve and ensure that the flange fork is in a plane. When repairing and disassembling the transmission shaft, print the assembly mark on the expansion sleeve and flange shaft, so as to maintain the original matching relationship during reassembly.

7. Always fill the universal joint cross bearing with grease, No. 3 lithium grease in summer and No. 2 lithium grease in winter.

As long as you pay attention to the above details when using, you can prolong the service life of the transmission shaft.