关键词: 汽车异响；安全带支架；问题分析；设计优化

Abstract: Vehicle knocking noise can increase user fatigue, significantly reduce comfort experience. Therefore, in the development stage of automobiles, it is necessary to attach great importance to and optimize the solution of noise problems. During the development phase of a certain sports utility vehicle (SUV), an internal assessment found that there is a noticeable knocking noise when pulling the seat belt strap. After objective analysis and cross validation, it is confirmed that the knocking noise originated from the impact between the webbing guide buckle and the metal bracket. In response to this problem, a short-term solution is developed through analysis and experimental verification: using felt to eliminate the gap between the guide buckle and the bracket. At the same time, a long-term solution is formulated: optimizing the design size. Finally, the problem of knocking noise is solved, the effectiveness of the optimization plan is verified, and the scrapping of bracket parts is avoided. At the same time, the problem is quickly and efficiently solved, ensuring that the entire vehicle project is put into production on time and providing technical experience for subsequent vehicle development.

Key words: Vehicle knocking; Safety belt bracket; Problem analysis; Design optimization