Shandong Doust Industry Technology Co., Ltd.,

What are the maintenance methods of the cross -shaft -type universal section?

The cross -shafts are an important connection component in the automotive transmission system. The maintenance method is very important. During the maintenance process, you need to check whether the rolling needle bearing is broken and the oil seal is invalid. If there is a problem, you need to replace the new items in time.

At the same time, it is necessary to check the wear, indentation and peeling of the cross -axis neck. If slight wear or slight indentation can continue to be used, but if the wear is severe or the indentation depth exceeds 0.1mm, it needs to be replaced.

In addition, the Wanxiang joint fork also needs to be checked. If a crack or other severe damage occurs, new items need to be replaced. After the assembly is completed, you need to pull the cross shaft to test with your hand to ensure that you rotate freely and have no loose feeling.

If the assembly is too tight or too loose, you need to find out the reason and the demolition and reassembly.

When you repair the cross -axis of the cross, you need to pay attention to some key issues. First of all, you need to check the rolling needle bearing. If you find that the roller is broken or the oil seal is invalid, it needs to be replaced in time. Secondly, it is necessary to check the wear, indentation and peeling of the cross axis.

If the neck is slightly worn, slightly indental or peeled, it can still be continued. However, if the neck wear is too much, severe indentation (depth of more than 0.1mm) or severe peeling, it needs to be replaced.

In addition, the Wanxiang joint fork also needs to be checked. If a crack or other severe damage occurs, new items need to be replaced.

Finally, after the assembly is completed, you need to pull the cross shaft to check with your hand to ensure that you rotate freely and have no loose feeling. If the assembly is too tight or too loose, you need to find out the reason and the demolition and reassembly.

In short, the maintenance method of the Cross -shaft -type universal section is very important, and you need to pay attention to some key issues. During the maintenance process, it is necessary to check the condition of the roller bearing, the cross axis, and the universal fork, and the inspection is required after the assembly is completed.

Only by ensuring that rotation is free and not relaxed can we ensure the normal operation of the automotive transmission system.

Causes of bearing vibration Poor installation. The installation of bearings must be carried out in strict accordance with the prescribed installation methods. Improper installation will cause uneven pressure distribution inside the bearing and produce vibration. Defects in the bearing itself. There may be some defects in the bearing during the manufacturing process, and these defects will gradually amplify during use, causing vibration. The service life is too long. During the working process of the bearing, due to fatigue, fatigue and other reasons, the geometric shape of the bearing will change, and vibration will first occur.

The rolling sound of the motor bearing: use a sound detector to check the size and sound quality of the rolling sound of the running motor bearing. Even if the motor bearing is slightly scratched, abnormal sounds and irregular sounds will be emitted. can solve this problem very well. If the lubrication and installation parts are suitable, the temperature of the motor bearing will rise sharply, and the temperature will rise abnormally. At this time, the operation must be stopped and necessary preventive measures must be taken.

Bearing vibration: The damage of bearing vibration to the bearing is still relatively obvious. For example, these common problems such as indentation, rust, crack, peeling, wear, etc. can be clearly felt during the test. Therefore, by using special bearing vibration A measuring instrument (frequency analyzer, etc.) can measure the magnitude of the vibration, and the specific situation of the abnormality cannot be inferred from the frequency division. The measured values vary depending on the conditions of use of the bearing or the installation position of the sensor. Therefore, it is necessary to perform certain operations on the measured values of each machine in advance to determine the data after Z.

The temperature of the motor bearing: the temperature of the motor bearing, some motor bearing temperature can be measured, if the oil hole can directly measure the temperature of the outer ring of the motor bearing, it is more appropriate. Usually, the temperature of the motor bearing slowly rises as the operation starts, and it is relatively stable after a few hours. The normal temperature of the motor bearing will be different due to the heat capacity, heat dissipation, speed and rotation mode of the machine. The use of thermal sensors can monitor the working temperature of the motor bearing at any time, so that preparations and reminders can be made before an accident occurs.

How to distinguish the meaning of motor bearing noise? The noise of motor bearings varies, and people can judge whether there is a serious defect in the bearing by the noise. But do you know how to tell the difference? In fact, the motor bearing noise generated inside the motor is very common in rolling bearings, because the rolling elements need to roll in the raceway to ensure the normal operation of the bearing. But usually, if these noises are basically negligible. However, if the noise is loud and can be heard clearly, it usually indicates a problem.

Below are common noises produced by motor bearings (the vast majority of which can be detected with a noise meter). Each noise represents a different motor bearing performance and how to eliminate each. If you hear a continuous, soft sound, that's the basic noise of rolling bearings, which happens when the raceways and rolling elements come into contact with each other. It's smooth and continuous. The faster the speed, the louder the sound, and if the radial clearance is reduced, the sound will also get louder. The higher the lubricating viscosity, the lower the sound, and the higher the shell stiffness, the lower the sound amplitude.

It is impossible to completely eliminate this noise, but it can be minimized by improving the quality of the motor bearings. Under radial loads, rattling is more likely to occur in large bearings. It occurs at low speed and occurs when the rolling elements collide with the cage or inner ring, and applying preload is an effective countermeasure to reduce this type of noise. There is also a case where the noise is louder and it sounds like metal sliding on metal. Contrary to expectations, this may not indicate a problem. Using relatively large motor bearings under radial loads can create squealing noises. Friction between the outer ring and rolling elements is believed to be the cause of squealing noise. Generally, reducing the radial clearance and using very shallow grooves in the outer ring raceway can be solved.