Seeing this problem, everyone should not be surprised. The sound problem of sheet metal parts is not easy to break. It is just that the problem of "clicking" sound at the end of the drive wheel when encountering this development and steering not long ago is locking the sound source. , Formulated measures to prevent and understand the "click" sound problem at the end of the drive wheel. During the whole process of solving the problem, I searched for some references related to the problem (also counted on the shoulders of giants), looking forward to scientific research in the ancestors Basically, based on practical experience, grasp the basic theory of relevant professional knowledge, and sort out the relative sound statistical analysis methods and problem-solving ideas.
Again, this question itself is also a hot topic in the field, and it is of great use value for scientific research and discussion. The article is divided into three parts. First, I will summarize the research of the ancestors to understand the problem of "click" at the end of the driving wheel. The thinking and current research status, followed by my summary and explanation of this problem; finally, according to specific classic cases, I will discuss some noises. Analysis criteria for difficult problems. It is very likely that some areas will involve personal opinions, and I hope to explore them.
Let us first understand the "click" noise at the end of the drive wheel based on the video of common failures to understand the protagonist of today-the "click" noise at the end of the drive wheel when the car is developing and turning.
In the video, when the car is moving forward, there is a noticeable "click" sound.
After hearing this noise, what should you do next?
This is how the sound technical engineer understands the problem of the "click" sound at the end of the drive wheel: According to a series of methods, the sound source is locked, and the acoustic material problem is converted into a travel problem. That is to say, the problem of acoustic materials is described in the language of productization of quantitative analysis. For example, which piece rubs against which piece under which conditions, causing noise; or, which piece and which piece collides with which piece under which conditions cause noise.
It is what sound technical engineers do.
Returning to this question is to find the source of the sound. Which two of them are in the middle of the problem?
There are many parts on the car chassis, and there are many parts that are likely to cause noise during development and steering: gearbox, suspension, shock absorber, lower arm, stabilizer bar, etc., are all likely to make noise under the same working conditions. . What everyone is talking about today is that the drive shaft and the hub bearing cooperate with the inner hole, which is affected by the output torque of the diesel engine, which causes the relative speed, produces the stick-slip effect, and causes the friction stick-slip sound problem. It is caused by other reasons, so I won't discuss it here.