Rear door action
The main role of the car rear door includes the following aspects :
emergency exit : The rear door of the car is located above the rear of the vehicle as an emergency exit. In special circumstances, such as the four doors of the vehicle cannot be opened and the occupants are trapped, they can escape through the emergency opening device at the back door to ensure safe evacuation .
convenient baggage loading : The rear door is designed so that passengers can easily enter and exit the vehicle, especially if there is more room in the rear of the vehicle, the rear door provides larger openings for loading and unloading luggage .
Intelligent operation function : The rear door of modern automobile is usually equipped with intelligent operation functions, such as key operation, intelligent key assistance and so on. For example, the rear door can be unlocked and opened remotely with the smart key, or the rear door can be opened by directly pressing the rear door open button and lifting up at the same time when the vehicle is unlocked .
safety design : Some models of the rear door is also equipped with anti-clip anti-collision function, sound and light alarm function and emergency lock function. These functions can quickly sense when obstacles are encountered and take appropriate action to protect children and vehicles .
A car's rear door is often called a trunk door, luggage door, or tailgate. It is located in the rear of the car and is mainly used for storing luggage and other items .
Type and design
The type and design of car rear doors vary by model and purpose:
cars : usually designed with ordinary rear doors to facilitate the entry and exit of passengers and luggage.
commercial vehicle : often adopt side sliding door or hatchback door design, convenient for passengers to enter and exit.
truck : usually adopts double fan opening and closing design, easy to load and unload goods.
special vehicle : such as engineering vehicles, fire trucks, etc., according to the special needs of the design of different kinds of doors, such as side open, back open, .
Historical background and technological development
The design of car rear doors has evolved with the development of the automotive industry. Early car rear doors are mostly simple rear door design, with the development of the automotive industry, commercial vehicles and trucks began to adopt more convenient passenger access to the side slide door and hatchback door design. Special vehicles have different types of doors designed according to their special needs to meet specific use scenarios .
The main materials of car rear doors include metal and plastic . The traditional metal rear door is usually connected by a metal steel sheet wrapped after cold stamping, and more and more models in modern cars use plastic rear doors, that is, plastic tail doors.
Advantages and disadvantages of plastic tail door and applicable models
Advantages of plastic tailgate include:
reduced cost : The relatively low price of resin can reduce the cost of bicycle manufacturing.
lightweight : plastic tail doors reduce the weight of 25% to 35% than metal tail doors, improving fuel economy and environmental protection.
high plasticity : resin casting can achieve complex modeling design.
Disadvantages include:
safety : Although the plastic tailgate will be verified by strength analysis during design to ensure that it meets the strength standard of the iron tailgate, its safety still needs to be verified by more practice.
Repair cost : Repair costs for plastic taildoors may be higher because special repair techniques and materials are required.
Applicable models include: Nissan Qjun, Toyota Highlander, Honda Crown Road, Infiniti QX50, Volvo XC60, Geely Bo Yue, Peugeot Citroen DS6, Land Rover Aurora and new energy vehicle models from Gahe, NIO, Volkswagen ID, Mercedes-Benz and other automakers .
Advantages and disadvantages of metal rear door and applicable models
Advantages of a metal back door include:
high strength : Metal materials have higher strength and stiffness to provide better collision protection.
durability : metal material durable, not easy to damage, low maintenance cost.
Disadvantages include:
large weight : metal material weight is large, affecting fuel economy.
high cost : The manufacturing cost of metal materials is higher.
Applicable models include: traditional cars and some models that do not require special emphasis on lightweight .
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