AMEE2020上海国际汽车底盘系统与制造工程技术展览会

【参展联系：马小姐 15121196695 同V】

AMEE2020上海国际汽车底盘系统与制造工程技术展览会定于2020 年10 月26-28 号在上海世博展览馆举办，预计将有350家世界各地企业参展，以及超过15000名汽车行业专业观众参观！

AMEE是全球汽车行业唯一专为汽车底盘系统产业链领域举办的专业技术展览会，展会将打造新能源汽车底盘系统智能化、电动化、电子化、轻量化，以及乘用车、商用车、特种车底盘设计开发工程、先进制造工程、底盘趋势工程、精益产品工程等产业链前沿技术与解决方案展示平台。

汽车底盘造和四大体详

解

车架

一、功用车架是汽车的基体，如发动机、变速器、传动机构、操纵机构、车身等总成和部件都安装于车架上。

二、车架的类型

汽车上装用的车架按其结构形式不同可分为：边梁式车架、中梁式车架、综合式车架和无梁式车架。边梁式车架由位于右左两侧的两根纵梁和若干横梁构成，横梁和纵梁一般由16Mn合金钢板冲压而成，两种者之间采用铆接或焊接连接。中梁式车架只有一根位于汽车中央的纵梁。纵梁断面为圆形或矩形其上固定有横向的托架或连接梁，使车架成鱼骨。

车桥

一、作用车桥通过悬架与车架连接，支承着汽车大部份重量，并将车轮的牵引力或制动力，以及侧向力经悬架传给车架。

二、类型汽车的车桥分为整体式和断开式两种。按使用功能划分，车桥又可分为转向桥、转向驱动桥、驱动桥和支持桥。

1、转向桥

安装转向轮的车桥叫转向桥。现代汽车一般都是前桥转向，也有少数是多桥转向的。

a、与非独立悬架匹配的转向车桥

这类转向桥结构大体相同，主要由前梁，转向节，主销和轮毂等部分组成。车桥两端与转向节绞接。前梁的中部为实心或空心梁。

b、与独立悬架匹配的转向桥

断开式转向桥的作用与非断开式转向桥一样，所不同的是断开式转向桥与独立悬架匹配，断开式车桥为活动关节式结构。

c、转向车轮定位

为了使汽车保持稳定的直线行驶，转向轻便、减少轮胎与转向机构的摩损，要求装配后的转向车轮、转向节和前轴与车架有正确的相对位置。前轮、前轴、转向节与车架的相对安装位置，称为转向车轮定位，也称前轮定位。前轮定位包括主销后倾、主销内倾、前轮外倾、前轮前束四个参数。

●主销后倾：主销装在前轴上后，其上端略向外倾，称为主销后倾。

●主销内倾：主销装在前轴上后，其上端略向内倾，称为主销内倾。

●前轮外倾：汽车的前轮安装后，其旋转平面上方略抽外倾，称为前轮外倾。

●前轮前束：汽车两个前轮的旋转平面不平行，前端略向内收，称为前轮前束。汽车的前束值一般小于10mm，通过改变横拉杆的长度可以调整前束的大小。

2、支承桥

转向桥和支持桥都属于从动桥。有些单桥驱动的三轴汽车，往往将后桥设计成支持桥。挂车上的车桥也是支持桥。发动机前置前驱动轿车的后桥也属于支桥。

Amee2020 Shanghai international automobile chassis system and Manufacturing Engineering Technology Exhibition

[contact: Miss Ma 15121196695 with wechat]

Frame

1、 Functional frame is the base of automobile, such as engine, transmission, transmission mechanism, control mechanism, body and other assemblies and components are installed on the frame.

2、 Type of frame

According to the different structure forms, the frame of automobile can be divided into side beam frame, middle beam frame, comprehensive frame and non beam frame. The side beam frame is composed of two longitudinal beams and several transverse beams on the right and left sides. The transverse beams and longitudinal beams are generally made of 16Mn alloy steel plate by stamping, and the two are connected by riveting or welding. The center beam frame has only one longitudinal beam in the center of the car. The longitudinal beam section is circular or rectangular, on which a transverse bracket or connecting beam is fixed to make the frame fishbone.

Axle

1、 The action axle is connected with the frame through the suspension, supporting most of the weight of the car, and transmits the traction or braking force of the wheel and the lateral force to the frame through the suspension.

2、 There are two types of axles: integral type and disconnected type. According to the use function, the axle can be divided into steering axle, steering drive axle, drive axle and support axle.

1. Steering axle

The axle on which the steering wheel is installed is called the steering axle. Modern cars usually turn at the front axle, and a few turn at multiple axles.

a. Steering axle matched with dependent suspension

The structure of this kind of steering axle is basically the same, mainly composed of front beam, steering knuckle, main pin and hub. The two ends of the axle are hinged with the knuckle. The middle part of the front beam is a solid or hollow beam.

b. Steering axle matching independent suspension

The function of the split steering axle is the same as that of the non split steering axle. The difference is that the split steering axle is matched with the independent suspension, and the split axle is a movable joint structure.

c. Steering wheel alignment

In order to keep the vehicle running in a stable straight line, turn easily and reduce the friction between the tire and the steering mechanism, it is required that the assembled steering wheel, knuckle and front axle have the correct relative position with the frame. The relative installation position of front wheel, front axle, knuckle and frame is called steering wheel alignment, also known as front wheel alignment. Front wheel alignment includes four parameters: kingpin caster, kingpin inclination, front wheel camber and front wheel toe in.

● kingpin caster: when the kingpin is installed on the front axle, its upper end slightly tilts outward, which is called kingpin caster.

● kingpin inclination: when the kingpin is installed on the front axle, its upper end slightly inclines inward, which is called kingpin inclination.

● front wheel camber: after the front wheel of the car is installed, the front wheel camber refers to the slight camber on the rotating plane.

● front wheel toe in: the rotation plane of the two front wheels of the car is not parallel, and the front end slightly retracts inward, which is called front wheel toe in. The toe in value of the car is generally less than 10 mm. The toe in size can be adjusted by changing the length of the tie rod.

2. Supporting bridge

Both the steering axle and the support axle belong to the driven axle. Some single axle drive three axle vehicles often design the rear axle as a support axle. The axle on the trailer is also the support axle. The rear axle of the front engine driven car also belongs to the branch axle.

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