重型自卸汽车设计(驱动桥总成设计)(有cad原图)

重型自卸汽车设计（驱动桥总成设计）

摘要

驱动桥作为汽车四大总成之一，它的性能的好坏直接影响整车性能，对于重型自卸汽车也很重要。驱动桥位于传动系的末端，它的基本功用是将传动轴或变速器传来的转矩增大并适当减低转速后分配给左、右驱动轮，另外还承受作用于路面和车架或车身之间的垂直力，纵向力和横向力。通过提高驱动桥的设计质量和设计水平，以保证汽车良好的动力性、安全性和通过性。

此次重型自卸汽车驱动桥设计主要包括：主减速器、差速器、轮边减速器、车轮传动装置和驱动桥壳进行设计。主减速器采用中央减速器附轮边减速器的形式，且中后桥采用双级贯通式布置形式，国内外多桥驱动的重型自卸汽车大多数采用这种布置形式；本设计主减速器采用了日益广泛应用的双曲面齿轮；差速器设计采用普通对称圆锥行星差速器；车轮传动装置采用全浮式半轴；驱动桥壳采用整体型式；并对驱动桥的相关零件进行了校核。

本文驱动桥设计中，利用了CAD绘图软件表达整体装配关系和部分零件图。

关键词：驱动桥、主减速器、差速器、半轴、双曲面齿轮

THE DESIGN OF HEAVY SELF UNLOADING

TRUCK

(THE DESIGN OF TRANSAXLE ASSEMBLY)

ABSTRACT

Drive axle is the one of automobile four important assemblies. It’s performance directly influences on the entire automobile，especially for the heavy self unloading truck . Driving axle set at the end of the transmission system. The basic function of driving axle is to increase the torque transported from the transmission shaft or transmission and decrease the speed ,then distribute it to the right、left driving wheel, another function is to bear the vertical force、lengthways force and transversals force between the road surface and the body or the frame. In order to obtain a good power performance, safety and trafficability characteristic, engineers must promote quality and level of design

Driving axle design of the heavy self unloading truck mainly contains: main reduction, differential, wheel border reduction, transmitted apparatus of wheel and the housing of driving axle. The main reducer adopts central reduction along with wheel border reduction. And also the design have the same run-through structure between middle transaxle and the rear one with heavy trucks home and abroad that have several transaxles. Hypoid gear, a new type gear is a good choice for the main reducer of heavy self unloading truck. The differential adopted a common, symmetry, taper, planet gear. Transmission apparatus of wheel adopted full floating axle shaft, and the housing of driving axle adopted the whole pattern,and proofread interrelated parts.

During the design process, CAD drafting software is used to expresses the wholes to assemble relationship and part drawing by drafting.

Key words：driving axle, the main reducer，differential, wheel border reduction, half shaft, hypoid gear

目录

第一章绪论 (1)

§ 1.1 驱动桥简介 (1)

§ 1.2 驱动桥设计的要求 (1)

第二章驱动桥的结构方案分析 (3)

第三章驱动桥主减速器设计 (6)

§ 3.1 主减速器简介 (6)

§ 3.2 主减速器的结构形式 (6)

§ 3.3 主减速器的齿轮类型 (6)

§ 3.4 主减速器主动齿轮的支承型式 (7)

§ 3.5 主减速器的减速型式 (8)

§ 3.6 主减速器的基本参数选择与设计计算 (8)

§ 3.6.1 主减速比的确定 (8)

§ 3.6.2 主减速器齿轮计算载荷的确定 (9)

§ 3.6.3 主减速器齿轮基本参数选择 (10)

§ 3.6.4 主减速器双曲面锥齿轮设计计算 (12)

§ 3.6.5 主减速器双曲面齿轮的强度计算 (21)

§ 3.7 主减速器齿轮的材料及热处理 (25)

§ 3.8主减速器第一级圆柱齿轮副设计 (26)

§ 3.8.1基本参数设计计算 (26)

§ 3.8.2圆柱齿轮几何参数计算 (27)

§ 3.9轮边减速器设计及计算 (28)

§ 3.9.1轮边减速器方案的确定 (28)

§ 3.9.2轮边减速器各齿轮基本参数的确定 (28)

§ 3.9.3各齿轮几何尺寸计算 (29)

第四章差速器设计 (31)

§ 4.1差速器简介 (31)

§ 4.2 差速器的结构形式的选择 (31)

§ 4.2.1 对称式圆锥行星齿轮差速器的差速原理 (32)