五十铃轻型货车驱动桥的设计

摘要

驱动桥位于传动系末端，其基本功用是增矩、降速，承受作用于路面和车架或车身之间的作用力。它的性能好坏直接影响整车性能，而对于载重汽车显得尤为重要。当采用大功率发动机输出大的转矩以满足目前载重汽车的快速、重载的高效率、高效益的需要时，必须搭配一个高效、可靠的驱动桥，所以采用传动效率高的单级减速驱动桥已经成为未来载重汽车的发展方向。驱动桥设计应主要保证汽车在给定的条件下具有最佳的动力性和燃油经济性。本设计根据给定的参数，按照传统设计方法并参考同类型车确定汽车总体参数，再确定主减速器、差速器、半轴和桥壳的结构类型，最后进行参数设计并对主减速器主、从动齿轮、半轴齿轮和行星齿轮进行强度以及寿命的校核。驱动桥设计过程中基本保证结构合理，符合实际应用，总成及零部件的设计能尽量满足零件的标准化、部件的通用化和产品的系列化及汽车变型的要求，修理、保养方便，机件工艺性好，制造容易。

关键字：轻型货车；驱动桥；单级主减速器；差速器；半轴；桥壳

ABSTRACT

Drive axle is at the end of the powertrain, and its basic function is increasing the torque and reducing the speed,bearing the force between the road and the frame or body.Its performance will have a direct impact on automobile performance .Because using the big power engine with the big driving torque satisfied the need of high speed，heavy-loaded，high efficiency，high benefit today’ heavy truck，must exploiting the high driven efficiency single reduction final drive axle is becoming the heavy truck’ developing tendency. Drive axle should be designed to ensure the best dynamic and fuel economy on given condition. According to the design parameters given ,firstly determine the overall vehicle parametres in accordance with the traditional design methods and reference the same vehicle parameters, then identify the main reducer, differential, axle and axle housing structure type, finally design the parameters of the main gear,the driven gear of the final drive, axle gears and spiral bevel gear and check the strength and life of them. In design process of the drive axle,we should ensure a reasonable structure, practical applications, the design of assembly and parts as much as possible meeting requirements of the standardization of parts, components and products’ univertiality and the serialization and change , convenience of repair and maintenance, good mechanical technology, being easy to manufacture.

Keywords: Pickup truck; Drive axle; Single reduction final drive; Differential; Axle; Drive Axle housing

目录

摘要..................................................................................................... 错误！未定义书签。ABSTRACTstract............................................................................ 错误！未定义书签。第1章绪论 .. (1)

1.1选题的背景目的及意义 (1)

1.2国内外驱动桥研究状况 (1)

1.3 设计主要内容和预期结果 (3)

第2章驱动桥的总体方案确定 (4)

2.1驱动桥的种类结构和设计要求 (4)

2.1.1汽车车桥的种类 (4)

2.1.2驱动桥的种类 (4)

2.1.3驱动桥结构组成 (4)

2.1.4 驱动桥设计要求 (5)

2.2设计车型主要参数 (5)

2.3主减速器结构方案的确定 (6)

2.3.1主减速比的计算 (6)

2.3.2主减速器的齿轮类型 (6)

2.3.3主减速器的减速形式 (8)

2.3.4主减速器主从动锥齿轮的支承形式及安装方法 (9)

2.4 差速器结构方案的确定 (10)

2.5半轴的形式确定 (11)

2.6桥壳形式的确定 (12)

2.7本章小结 (13)

第3章主减速器设计 (14)

3.1概述 (14)

3.2主减速器齿轮参数的选择与强度计算 (14)

3.2.1主减速器计算载荷的确定 (14)

3.2.2主减速器齿轮参数的选择 (15)

3.2.3主减速器齿轮强度计算 (18)