Zhejiang Waxing Electromechanical Co., Ltd is one of the most professional manufacturers and suppliers of universal joint cross 28x69mm bearing for car in China. Welcome to buy high quality customized bearings made in China here from our factory. For price consultation, contact us.
| Product Name | U Joints Price Small Universal Joint |
| Application | Machine, Cars |
| Material | Steel |
| Size | 28*69mm |
| Service | OEM support |
| Shipping Info | By sea, by air, express and so on |
| Cetification | ISO9001:2015 |
| Application |
Automobile,mechanical |

The automobile universal joint is an important component in the automobile transmission system. Its principle involves different types, including non-constant velocity universal joints, quasi-constant velocity universal joints, constant velocity universal joints and flexible universal joints. Each type All have different working principles and applications.
1. Unequal velocity universal joint: When the angle between the two axes connected by the universal joint is greater than zero, motion is transmitted between the output shaft and the input shaft with a changing instantaneous angular velocity ratio, but the average angular velocity is equal. This kind of universal joint is mainly used for the connection between the drive shaft and the wheel.
2. Quasi-constant velocity universal joint: This kind of universal joint transmits motion at an equal instantaneous angular velocity at the designed angle, and transmits motion at an approximately equal instantaneous angular velocity at other angles, thus improving the smoothness of the transmission.
3. Constant velocity universal joint: The output shaft and input shaft connected by this universal joint always transmit motion at equal instantaneous angular speeds, ensuring optimal transmission efficiency and stability.
4. Flexible universal joint: In the torsional direction, this universal joint has obvious elasticity and can absorb vibration and impact in the transmission system.

A universal joint, also known as a universal joint in English, is a component that realizes variable-angle power transmission. It is used where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal transmission device of the automobile drive system. The combination of the universal joint and the drive shaft is called a universal joint transmission device. On front-engine rear-wheel drive vehicles, the universal joint transmission device is installed between the transmission output shaft and the drive axle main reducer input shaft; while front-engine front-wheel drive vehicles omit the transmission shaft and the universal joint is installed Between the front axle half-shaft and the wheels, which are responsible for both driving and steering.
The structure and function of the universal joint is a bit like the joints on the human body's limbs. It allows the angle between the connected parts to change within a certain range. In order to meet the power transmission, adapt to the angle changes caused by the steering and the up and down jumps when the car is running, universal joints are commonly used to connect the drive axle, half shaft and axle of a front-drive car. However, due to the limitation of axial size, which requires a relatively large deflection angle, a single universal joint cannot make the instantaneous angular velocities of the output shaft and the input shaft equal, and it is easy to cause vibration, aggravate the damage of components, and produce a lot of noise, so A wide variety of constant velocity joints are widely used. On front-drive cars, each half-shaft uses two constant velocity universal joints. The universal joint close to the transaxle is the inner half-shaft universal joint, and the one closest to the axle is the outer half-shaft universal joint.
In a rear-drive car, the engine, clutch and transmission are installed on the frame as a whole, and the drive axle is connected to the frame through elastic suspension. There is a distance between the two and needs to be connected. When the car is running, the uneven road surface will cause bounce, load changes or the installation position difference between the two assemblies, etc., which will cause the angle and distance between the transmission output shaft and the drive axle main reducer input shaft to change. Therefore, the rear drive car will Universal joint transmission uses double universal joints, that is, there is a universal joint at each end of the transmission shaft. Its function is to make the angles at both ends of the transmission shaft equal, thereby ensuring that the instantaneous angular velocities of the output shaft and the input shaft are always equal.
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