What is the rear door lock block
The rear door lock block is an important part of the door lock system. Its main function is to ensure that the driver controls the synchronous opening and locking of the doors of the whole vehicle through the driver's side door lock switch. It uses specific electronic circuits, relays and door lock actuators (such as electromagnetic coil type or DC motor type) to achieve unlocking and unlocking actions .
Working principle
The rear door lock block of an automobile is usually composed of two parts: mechanical and electronic. The mechanical part locks and unlocks through the coordination of various components, while the electronic part plays the role of insurance and control. For example, the rear door lock block of the Audi A4L consists of two mandrel drive rods that open the trunk via a motor drive nut .
Fault cause and solution
lock block dirty : cleaning may solve the problem.
Door hinges or limiter rust stuck : apply grease regularly.
Cable position is inappropriate : Adjust the cable position.
Door handle lock and lock post friction : use screw loosening agent lubrication.
card fastening problem : Adjust the QQ ring position of the card.
The door rubber strip is loose or aging : repair or replace it regularly.
door lock fault : need to go to 4S shop to adjust or replace .
Replacement procedure
The specific steps to replace the rear door lock block are as follows:
Remove the fixing screws.
Remove the first pull rod.
Remove the second pull bar.
Remove the third pull bar.
Unplug the tailgate light.
Remove a plastic clasp from the old lock and install it in the red circle of the new lock.
Reinstall the three pull rods and three screws in the same order as before, and insert the tailgate light cable to .
The materials of car rear door lock block mainly include polyamide (PA), polyether ketone (PEEK), polystyrene (PS) and polypropylene (PP) .
The selection of these materials is based on their individual characteristics:
Polyamide (PA) and polyether ketone (PEEK) : These high-performance plastic materials have excellent mechanical properties, high temperature resistance and chemical corrosion resistance. They are often used in the manufacturing of high-end automotive lock blocks, which can improve the service life of the lock block and the overall safety of the vehicle .
polystyrene (PS) and polypropylene (PP) : these general plastic materials have more advantages in cost, although the performance is general, but enough to meet the needs of ordinary models, so it is widely used in the manufacturing of ordinary models of lock blocks .
In addition, with the development of science and technology, new plastic materials such as PC/ABS alloy have gradually been applied in automotive lock blocks and other fields. PC/ABS alloy combines the high strength of PC and the easy plating performance of ABS, with excellent comprehensive properties, can improve the service life and safety of parts .
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