贯通式双联驱动桥（中后桥）设计（说明书+CAD图纸+开题报告+任务书）_驱动桥零件图cad

中后桥设计

摘要

重型载货汽车中后桥支承着重载汽车的满载负重和地面给车轮的反作用力、一个框架和一个用于垂直悬挂体以及横向和纵向的力和力矩，还受冲击载荷的作用。因此，一个良好的中后桥对于载重汽车性能来说是有绝对的提高。对于重载汽车来说：采用贯通式驱动桥的重要性体现在提高载货汽车的承载能力，并且让传动系的结构在保证传动要求的前提下变得简单，使中后桥的主要零件尽可能通用。重型载货汽车的保障性、持久性和行驶性能被其中后桥的构造型式和设计尺寸所限制着。因此,设计一个传动效率高、性能良好的贯通式驱动桥对于重型载货汽车势在必得。该设计第一个内容就是选择好中后桥重要零部件的构造型式和重要设计尺寸；之后选择总体的设计框架；然后再分别校核主动锥齿轮、从动锥齿轮、位于差速器中的行星齿轮和半轴齿轮、全浮式半轴、整体式桥壳、万向节的强度以及校核支承轴承的使用寿命。

本设计具有以下优点：采用双级贯通式驱动桥，提高了车辆的承载能力，简化传动系结构并使各驱动零件特别是桥壳等主要零件尽可能通用；中后桥间的传动轴是串联中桥和后桥，其形式为传动轴从离变速器较近的驱动桥中穿过，通过万向节联接后，将动力传递给另一驱动桥。

关键字：重型载货汽车，中后桥，双级，贯通式，螺旋锥齿轮

MIDDLE AND REAR AXLE DESIGN

ABSTRACT

Heavy duty truck bridge bearing heavy vehicle loaded with weight and ground to wheel counter force, a framework and a for vertical suspension body and horizontal and vertical forces and moments, but also by impact load. Therefore, a good in the rear axle for truck performance is an absolute improvement. For heavy duty vehicles: the drive through the importance of bridge is reflected in improving the truck carrying capacity, and make the structure of transmission system in ensuring the premise of the requirements of transmission becomes simple, the rear axle main parts as general as possible. The protection, durability and performance of heavy duty truck are restricted by the structure type and design parameters of the rear axle. Therefore, the design of a high transmission efficiency, good performance of the through type drive axle for heavy duty truck. The design of the first content is determined in the structural pattern of the main components of the bridge and the main design parameters; then identifies the overall design scheme; finally the driving bevel gear, a driven bevel gear, differential ordinary tapered planetary gear, a half axle gear, full floating type axle, overall bridge shell, a universal joint strength check and check the life of bearing.

This design has the following advantages: the two-stage tandem axles and improve the vehicle carrying capacity, simplify the transmission system structure and make the drive parts, especially the main parts of the bridge shell as general as possible, between the rear axle drive shaft is series bridge and the bridge, in the form of shaft through the nearer from the transmission of drive axle, after connected with a universal joint, power transfer to another drive axle.

Key words: heavy duty truck, rear axle, double stage, through type,  spiral bevel gear.