学学士学位论文- I -汽车天窗的整体结构设计汽车天窗的整体结构设计摘要摘要汽车天窗作为汽车行驶时的地唤起设备，已经逐渐成为各个汽车厂家 生产轿车的标准配置。在汽车天窗市场竞争中电动汽车天窗具有很强的优 势，如结构简单、使用方便、可靠性高、具有很好的市场潜力等。因此选 择设计电动式天窗具有良好的市场前景，也可使整车在汽车竞争白热化的 今天占领了更大份额的市场。 本次设计首先了解了天窗的作用、种类、特点和天窗各种零部件执行 标准。然后，对天窗的密封排水方式、性能要求、也天窗对风噪声的影响 做出了说明和分析。在掌握天窗的工作原理后在天窗设计部分，依据了蜗 轮蜗杆减速器的原理设计了电动机换向减速传动机构，结合天窗的结构性 能对天窗进行了设计与强度校核，对动向蜗轮传动杆的主要参数和尺寸分 析，选择传动材料和类型，按蜗轮齿面接触疲劳强度计算校核蜗轮齿根疲 劳强度，对蜗杆蜗轮各部分尺寸计算，天窗电机最终动力输出选择。最后， 分析并绘制了汽车天窗滑动机构、连接机构、驱动机构的CAD零件图和装 配图，同时也对车顶开关的工作过程进行了简要分析。关键词：汽车天窗；换向减速机构；滑动机构；强度校核学学士学位论文- II -The Overall Structure Design of Automobile SunroofsAbstractAs the ventilation device when driving a car, sunroofs have gradually become the standard equipment for nearly every car manufacture. In the market competition for sunroofs, electric ones enjoy great popularity for its simple structure, easy handling, high reliability and market potential, etc. Therefore, choosing to design electric sunroof has very good market prospect, making the whole car occupy more market share in the enormously fierce competition of automobile.The design of the thoughts and ideas first understand the skylight, types, characteristics and various parts of the implementation of standards. Then make a description and analysis of the performance of the sealing drainage way, skylight requirements influence on wind noise. The working principle of skylight skylight design master in part, on the basis of the principle of the worm reducer design the motor reversing speed reducer, combined with the structure properties of skylight and requirements to the roof for the design and strength check, the main analysis of the trend of worm gear drive rod parameters and size, select gear materials and types, according to the turbine gear surface contact fatigue strength calculation, checking the fatigue strength calculation of the worm and worm wheel worm gear tooth root, the size of each part of the roof, and click on the final power output selection. Finally, analysis and draw a car sunroof sliding mechanism, connecting mechanism, driving mechanism of the CAD part drawings and assembly drawings, also makes a brief analysis on the working process of the switch for roof.学学士学位论文- III -Key Words: sunroof; reversing deceleration structure; sliding mechanism; strength check学学士学位论文- IV -目录目录摘要.I Abstract.II 第 1 章 绪 论.1 1.1 课题研究的目的和意义.1 1.2 汽车天窗的国内外发展状况.2 1.3 研究内容与方法.4 第 2 章 天窗结构及性能要求.6 2.1 天窗工作原理.6 2.2 汽车天窗的作用.6 2.3 天窗的种类及特点.7 2.3.1 汽车天窗种类.7 2.3.2 汽车天窗特点及各部件执行标准.7 2.4 天窗的结构型式.9 2.4.1 天窗的结构.9 2.4.2 天窗的密封（排水）方式.10 2.5 天窗的性能要求.11 2.5.1 安全性.11 2.5.2 性能要求.12 2.5.3 天窗系统对风噪的影响.14 2.6 本章小结.14 第 3 章 汽车天窗设计.15 3.1 天窗结构和工作原理设计.15 3.1.1 滑动机构.15 3.1.2 连接机构.15 3.2 汽车天窗动力机构.17 3.2.1 驱动机构.17 3.2.2 车顶开关.18 3.3 本章小结.