What parts should a car chassis include?

I. The specific parts of the automobile chassis are as follows:

1. transmission system: clutch, transmission, final drive, half shaft, universal joint and transmission shaft.

2. Drive system: frame, balance bar, axle, wheel, wing beam, shock absorber, claw, arm and three-way catalytic converter.

3. Steering system: steering shaft and tie rod.

4. Brake system: brake disc, brake cylinder and brake pad.

2. The components of the automobile chassis are constructed as follows:

1, transmission system:

The transmission system is mainly composed of clutch (or torque converter), transmission (manual and automatic), universal transmission device and driving axle, in which the universal transmission device is composed of universal joint and transmission shaft, and the driving axle is composed of main reducer and differential. It has the functions of reducing speed and increasing torque, changing speed and torque, reversing, interrupting power transmission of transmission system and differential speed.

For rear-wheel drive cars, they are arranged step by step; For a front-wheel drive car, its gearbox and drive axle are combined into one, which is collectively called gearbox. It can be seen that all parts from the clutch to the middle of the wheel belong to the transmission system.

I don't know if you have seen a paradox here, that is, the gearbox is included in the chassis system. In fact, according to this classification, cars should be two big blocks: engine and chassis.

2. Drive system:

The driving system of an automobile consists of a frame, an axle, a suspension, wheels and tires. Its function is to receive engine torque from the transmission system and generate driving force to drive the car; Bear the total weight of the car, transmit and bear the reaction force and torque of the road surface acting on the wheels in all directions; Bear the impact and vibration of various forces and moments given to the car by the outside world, and make it buffer and reduce vibration to ensure the riding comfort and handling stability of the car; Coordinate with the steering system to control the driving direction of the car; Work in coordination with the braking system to ensure the safety and stability of the car.

For trucks with non-load-bearing body and integral bridge structure, it has a huge and solid frame, and all the forces on the car are ultimately borne by the frame. Its suspension system mostly adopts leaf spring, which is not comfortable, but can bear a lot of weight.

For cars and SUVs with load-bearing bodies, there is no frame, and the suspension system mostly adopts independent suspension. All parts in the drive system are finally installed on the car body, and the suspension system and the car body are usually connected by a subframe.

The driving feeling, or maneuverability, of a car is mainly determined by the driving system of the car, and the suspension system plays a vital role in it. Most cars use independent suspension, including McPherson type, double wishbone type and multi-link type. With different buffer springs and shock absorbers, the handling of the car will be completely different. Especially, the support and deformation of the suspension system have a great influence on the handling of the car when it is turning. Therefore, it makes sense that the chassis of a car mainly depends on suspension.

3. Steering system

The special mechanism used to change the direction of the car in the car is called the car steering system. The function of automobile steering system is to ensure that the automobile can drive straight or turn according to the driver's wishes. Automobile steering system is mainly composed of steering control mechanism, steering gear and steering transmission mechanism.

At present, most automobile steering systems have power assist devices, which generally include hydraulic power assist and electric power assist. Because the advantages of electric power are more obvious, more vehicles are equipped with electric power, and only a few vehicles with special needs are equipped with hydraulic power.

Steering system and suspension system are inseparable. The two must cooperate and coordinate with each other in order to make the car have good handling.

4. Brake system

Automobile braking system refers to a series of special devices that can generate braking force for automobiles. Its main functions are: to slow down or stop the car in the shortest distance according to needs, to ensure driving safety, and to make drivers dare to play the high-speed driving ability of the car, thus improving the productivity of automobile transportation; And the car can be reliably parked on the ramp.

The braking system is undoubtedly the most important active safety device in automobiles. At present, various brake assist systems have been developed in automobiles, such as ABS, EBD, CBC, EBA, BAS, BA, ASR, TCS, TRC, HAC, AUTOHOLD, HDC, BOS, etc. Their function is either to increase the braking force or to maintain the stability of the car body when braking.

You should understand that the chassis of a car refers to a series of components that support driving and control the driving state of the car. In our most common car, all parts except engine, gearbox, body and electrical system can be classified as chassis. It should be noted that everyone should distinguish the chassis from the big floor under the car. It's part of the car body, not the chassis.

There are many models that use the so-called same chassis, but actually use the same transmission, suspension, steering and braking system; There are also some models developed on some chassis, that is, on the basis of the original chassis, some changes have been made in some parts, such as raising the suspension, which can be developed into SUV models.

The traditional three parts of a car are no longer applicable to today's cars. Because the main function of a car is to carry people, the car body is undoubtedly very important. The load-bearing car body is widely used, which not only provides space for people to sit, but also is the basic part of the car. Almost all automobile parts are directly or indirectly installed on the body. The engine and gearbox are almost an inseparable whole. Suspension plays an important role in the chassis system.