某中巴客车侧窗遮阳帘异响原因分析及对策研究

Analysis and countermeasure study on abnormal noise of side window sunshades of a certain midibus

某中巴客车在城郊路面、试验场比利时路、鹅卵石路等较差路况行驶时,车辆侧窗顶部有明显类金属“卡啦”声、侧窗遮阳帘拉杆明显抖动异响以及定置状态下下拉遮阳帘布时刮擦异响。从现象分析入手,首先排查锁定异响源为遮阳帘下拉杆、遮阳帘内部弹簧锁止机构以及遮阳帘顶部外壳,深入研究其内部结构及异响产生机理,最后针对异响真因对遮阳帘下拉杆、遮阳帘顶部卷筒及内部锁止机构制定优化措施,并验证了措施的有效性,从而解决了该异响问题。对于深入研究遮阳帘总成异响发生的成因,寻找有效的控制对策具有一定的工程实践意义。

In the performance test of a certain midibus on rough roads such as suburban roads,Belgian pavements,and cobblestone roads,there were distinct metallic"clanking"sounds from the top of the side windows,noticeable rattling noises from the pull rods of the side window sunshades,and scraping noises when lowering the sunshade fabric in the fixed position.Starting with a phenomenological analysis,the sources of the abnormal noises as the pull rods of the sunshades,internal spring locking mechanisms,and the top casing of the sunshade assembly were initially identified.Further investigation into their internal structures and the mechanisms causing the noises was conducted.Finally,optimization measures were developed for the pull rods,top roller,and internal locking mechanisms of the sunshades to address the root causes of the noises.The effectiveness of these measures was verified,effectively resolving the noise issue.It has practical significance in deepening the understanding of the causes of abnormal noise in sunshade assemblies and finding effective control measures.