高机动越野运输车0.5t驱动桥的结构设计 毕业设计.doc

摘 要 驱动桥作为传动系的主要组成部件之一，尤其对于越野车，车辆的动力性、通过性、安全性更为重要。该设计的研究目的就是为了使其在山地和高原以及平原地带进行行驶、救援及勘探等。因此，该设计论述了高机动越野运输车0.5t驱动桥的结构设计过程，其中主要包括主减速器、差速器和轮边减速器。根据设计参数选择驱动桥的结构形式，然后根据类似驱动桥结构确定出总体设计方案。最后，对主减速器的主、从动锥齿轮、差速器齿轮、轮边减速器及全浮式半轴和驱动桥壳进行强度校核；对支承半轴进行寿命校核。该轮边减速器可通过更换齿轮的的方式来改变传动比，从而较好地适应山地要求。在提供较大传动比的同时，又能增大离地间隙，提高汽车的通过性，并配合轮边减速器的使用。最后确定方案，设计出一个高效、可靠的驱动桥。 关键词：越野车；驱动桥；主减速器；轮边减速器 ABSTRACT Drive axle transmission system as one of the main components, especially for off-road vehicles, the vehicles power, by nature, safety is more important. This design research purpose is to make it in the hills and plains of the plateau and driving, rescue and exploration. Therefore, this design discusses high-mobility off-road vehicle structure design of 0.3 t driving axle process which include main reducer, differential and wheel edges reducer. According to the structure of the drive axle design parameters selection, then according to similar forms of driving axle structure determine the overall design scheme. Finally, the main reducer Lord, driven bevel gear, differential gears, wheel edges reducer and complete floating half axle and driving axle shell check intensity; Life for supporting half shaft dynamicrigidity. This wheel edges of gear reducer can by changing the way to change gear ratios, thus better meet the mountain requirements. In provide larger ratio, and meanwhile increases ground clearance is achieved, making cars through sex, and the use of speed reducer with wheel edges. The final determination scheme, design a more efficient and reliable driving axle. Key Words：suvs；axles；main reducer；wheel edges reducer目 录 摘 要 I ABSTRACT II 1引 言 1 1.1设计题目的来源和意义 1 1.2高机动越野车的发展及车结构的特点 2 2 驱动桥结构方案分析 3 3 主减速器的方案论证 4 3.1主减速器的结构形式的选择 4 3.1.1 主减速器的齿轮类型选择 4 3.1.2 主减速器的减速形式选择 6 3.1.3 主减速器主、从动锥齿轮的支承型式 8 3.2 主减速器基本参数的选择与计算载荷的确定 10 3.2.1主减速器齿轮计算载荷的确定 10 3.2.2主减速器齿轮基本参数的确定 10 3.3主减速器锥齿轮强度的计算 12 3.3.1单位齿长上的圆周力 12 3.3.2轮齿的弯曲强度计算 13 3.3.3轮齿的接触强度计算 14 3.4主减速器轴承的计算 15 3.4.1锥齿轮的轴向力和径向力计算 15 3.4.2