What is the front door lock block
The front door lock block is a key part of the door lock system, which is mainly responsible for controlling the opening and closing of the door and the safe locking. It is usually composed of components such as a large carrier, a small carrier and a pull plate, which together ensure the safety and convenience of the door .
Structure and function
large body : The large body is the main part of the car door lock, responsible for driving the big lock tongue to move. Its head is the installation position of the large lock tongue, the middle square hole is matched with the hanging ear on the pull plate, and the outside step provides the clamping groove for the brake plate to ensure that the brake plate is effectively braking the large carrier body. At the same time, the large body is also designed with a slide clamp, which is convenient to pull the slide and avoid the slide block from obstructing the large body .
small bracket : The small bracket is an important component of controlling the self-locking of the large lock tongue. Its head is used to install a small lock tongue, and the protruding triangle part in the middle is used to push the brake disc to eliminate the self-locking effect of the brake disc on the large carrier body. The small bracket design makes the door lock system more reliable and secure .
pull piece : pull piece in the large lock tongue retraction to position and release the role of self-locking. The hanging ear at the top of the pull plate can be inserted into the rectangular hole of the large carrier body, and the pull plate can drive the large carrier body to shrink. At the same time, the support angles on both sides of the drawing plate can flip the brake plate to release the self-locking of the brake plate to the large support body .
Disassembly and replacement method
Removing or replacing the front door lock block of a car requires certain skills and tools. The following are the general disassembly steps:
Open the door and use a wrench to remove the screws on the inside of the door.
Locate the lock block above the bottom of the door, remove the lock core and retain the parts inside.
Remove the wire connecting the lock block and the plastic sleeve holding the lock block in place.
Remove the lock block with a wrench to disassemble, clean or replace the part. It should be noted that the action should be light during the disassembly process to avoid damaging the parts. When replacing the lock block, it is also necessary to remove the door trim panel, sound insulation panel, glass, elevator and motor parts .
The materials of car front 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 properties:
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 manufacture of high-end automotive lock blocks, which can improve the service life of the lock block and enhance the overall safety of the vehicle .
polystyrene (PS) and polypropylene (PP) : these general plastic materials have more advantages in cost, although the performance is average, but enough to meet the needs of ordinary vehicles .
In addition, new plastic materials such as PC/ABS alloys are also used 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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