The Function of the Universal Joint in Cars, Let's Find Out!

The universal joint in the automotive world is also known as a component of the propeller shaft. This component is located in the undercarriage of the vehicle and plays a role in transferring engine power from the transmission to the differential. As a vehicle owner, it is essential to understand the function of the universal joint to maintain the car effectively. For more details, please refer to the following review.

Function of the Universal Joint

The universal joint has an important function in cars. The complete functions are as follows.

1. Universal connection

As the name suggests, the universal joint functions as a universal connection (cross joint or coupling joint). The universal joint itself has a plus-shaped design at its ends. The ends of the universal joint are also equipped with roller bearings that serve as a connection to other components. The propeller shaft and yoke will connect to each end of the cross joint. Thus, the roller bearing helps the propeller shaft to continue rotating even when there is a change in angle.

2. Optimizing the performance of the drive shaft at any angle

The universal joint (cross joint) functions to connect the transmission shaft, propeller shaft, and differential simultaneously. Meanwhile, the drive shaft serves to transmit power from the engine to the rear wheel axle. To ensure that the angle changes appropriately during shaft movement, the angle of the transmission sleeve yoke is adjusted by the car's rear suspension. This way, the universal joint (cross joint) can move freely.

3. Enhancing the rotation of the propeller shaft during angle changes

As previously explained, the universal joint also functions as a support for the rotation of the propeller shaft when angle changes occur. The rotation of the propeller will happen evenly and smoothly when the car traverses rough or damaged roads.

4. Closing holes in cars with a rear-wheel drive (RWD) system

Cars with a rear-wheel drive or RWD (Real Wheel Drive) system have holes connected to the drive shaft. There are four holes with a diameter of approximately 4 inches. The universal joint functions to close these holes to enhance the power transmitted by the drive system. The goal is for the rear wheels of the car to move optimally.

5. Improving car performance during maneuvers

As explained above, the universal joint helps optimize the transfer of power to the wheels. Additionally, the universal joint makes the car's steering easy to control, allowing the car to turn smoothly without producing humming or squeaking sounds. This way, the car's maneuverability becomes more perfect. 

Components of the Universal Joint

For the universal joint to function optimally, it certainly requires assistance from several components within it. Here are the complete components.

1. Yoke

The connecting component of the coupling joint to connect with the propeller shaft.

2. Cup

The universal joint component that serves as a seat for the needle bearing. Additionally, the cup functions to connect the sleeve yoke to the spider.

3. Needle bearing

Functions to optimize the movement of the coupling joint or cross joint hinge. 

4. Seal

Functions as a protector for the bearing to prevent it from easily getting dirty and damaged.

5. Cross

Functions as a seat or container for the two yokes that are already equipped with bearings. 

Thus, some important functions of the universal joint. Given its significant role, you must always pay attention to the condition of this component. Don't forget to perform regular maintenance at the nearest official Daihatsu workshop, so that the condition of the universal joint and other car components is always maintained.