Bearing is known as the “joint of industry” and is widely used in various fields of national economy and national defense construction.

Bearing is known as the “joint of industry” and is widely used in various fields of national economy and national defense construction. Today, let’s take a look at the common component in Automobile – universal joint bearing. The so-called universal joint bearing refers to the mechanical structure that uses ball connection to realize the power transmission of different shafts. The combination of universal joint and transmission shaft is called universal joint transmission device.

Part 01

classification

Universal joint bearings are mainly divided into constant velocity universal thrust ball bearing joints, constant velocity universal joints, ball cage universal joints, three pin shaft universal bearing joints, double factory universal joints, etc. different types of universal joints have their own advantages and disadvantages and are also applied to different fields. For example, the ball cage universal joint, because the maximum intersection angle of two shafts is 42&am type. When working, regardless of the transmission direction, the six steel balls will transfer all the force. It has the characteristics of compact structure, strong bearing capacity and convenient disassembly and assembly. It has become a common bearing component in automobiles at present.

The universal joint bearing ensures the basic operation of the vehicle. On the vehicle with front engine and rear wheel drive, the universal joint transmission device is installed between the output shaft of the transmission and the input shaft of the main reducer of the drive axle. In front engine front wheel drive vehicles, the transmission shaft is omitted, so the universal joint is installed between the front axle half shaft and the wheel, which is responsible for driving and steering.

Part 02

Common faults and Countermeasures

We know that the bearing needs regular maintenance to eliminate the fault. The common faults of universal joint bearing are mainly the wear of journal and bearing and the bending deformation of each journal, resulting in that the center lines of each axis of its cross shaft are not in the same plane or the center lines of two adjacent axes are not vertical. Due to the excessive wear clearance between the journal and bearing of the universal joint cross shaft, the cross shaft shakes during operation, which makes the center line of the transmission shaft deviate from its rotation center line, resulting in vibration and abnormal sound of the transmission shaft during operation.

The wear of cardan spider journal and bearing shall not exceed 0.02 ~ 0.13MM from the point of view of use, and generally remain at about 0.01mm. If it exceeds 0.13MM, the transmission shaft will vibrate and make noise. The wear is mainly caused by lack of lubrication, so regular maintenance is very important. In normal maintenance, grease should be added frequently to prevent the wear of cross shaft journal and bearing caused by lack of grease.

Part 03

Precautions in use

Finally, let’s take you to know the precautions of universal joint bearing in use. Collision and stacking should be avoided during disassembly, handling and inventory; Regularly check the sealing condition of intermediate support bearing, cross shaft bearing and sliding spline, and replace the failed oil seal in time. Inject lubricatin