Working principle of automotive ball cage bearings

Automobile ball cage bearings, also known as constant velocity universal joints, are important components in car transmission systems. Its main working principle and characteristics are as follows:

1、 Basic Structure

Automobile ball cage bearings are mainly composed of sliding sleeves, three-way shafts, transmission shafts, star shaped sleeves (inner raceways), cages (ball cages), bell shaped shells (outer raceways), copper balls or bearings, and other parts. Among them, the star shaped sleeve is connected to the active shaft, providing internal support and rolling trajectory; The bell shaped shell provides external support and rolling trajectory; The holder is used to fix the steel ball and maintain its position; Copper balls or bearings are used to enhance rotational flexibility and stability.

2、 Working principle

Power transmission:

Ball cage bearings, through their universal characteristics, transmit the power of the engine from the transmission to the driving wheels, driving the sedan to travel at high speeds.

In this process, the active shaft transmits power to the inner and outer ball cages, and the steel balls roll in the groove tracks of the star shaped sleeve and bell shaped shell, thereby achieving smooth power transmission.

Constant velocity principle:

The constant velocity principle of the cage type universal joint is that the force transmission point is always located on the bisector of the angle between the two axes during the working process.

When there is an angle between the driving shaft and the driven shaft, the steel ball is always located on the bisector of the angle, so that the rotational speed of the driving shaft and the driven shaft is always equal, ensuring the constant speed transmission of power.

Adapt to changes:

The telescopic ball cage universal joint (VL joint) in ball cage bearings allows axial expansion and contraction, and can adapt to changes in different wheelbases.

Especially the trident or six bead design of the inner ball cage, which can slide inward and outward to adapt to the length changes of the drive shaft during vehicle movement.

3、 Functional Features

Transmitting heavy driving torque:

Ball cage bearings can withstand large loads and transmit heavy driving torque.

High transmission accuracy:

Due to the use of precision forged parts in ball cage bearings, they have high transmission accuracy.

Strong adaptability:

Ball cage bearings can adapt to different transmission angles and wheelbase changes, and are widely used in various car transmission systems.

Low noise:

Especially with the six ball inner cage design, torque is transmitted through steel balls in the inclined track, effectively reducing noise issues.

In summary, automotive ball cage bearings achieve smooth and constant speed power transmission through their unique structure and working principle, and have good adaptability, high precision, and low noise characteristics. Plays an important role in the transmission system of cars.