关键词: 车门玻璃下降；水切翻转敲击；异响问题；稳定性

Abstract: According to the research of "grunting" abnormal sound problem when the door glass drops, it is found that the stability of weatherstrip itself is the reason of abnormal sound. By changing the friction characteristics of the contact surface, the external weatherstrip problem is confirmed. Based on the self-locking sliding mechanism and finite element simulation, the abnormal sound principle of weatherstrip turning knocking sheet metal in stick-slip motion is studied clearly, and the reason of abnormal sound in high temperature dust weather is explained. Taking into account the impact of layout space and natural environment, exclude the change of lip angle and friction coefficient, and analyze the three potential causes of abnormal sound, extend the weatherstrip barb against the sheet metal, eliminate the possibility of weatherstrip knocking sheet metal, and completely solve the problem of abnormal sound.

Key words: Door glass drops; Weatherstrip turning knock; Abnormal sound problem; Stability