Car door lock mounting bolt

Abstract

The invention discloses a car door lock mounting bolt which comprises a bolt head and a screw rod. The screw rod is provided with a threaded section, the threaded section comprises first screw threads and second screw threads, the first screw threads are matched with internal threads of a car body, the second screw threads are in interference fit with the internal threads of the car body, the crest height of the second screw threads is smaller than that of the first screw threads, the angle of the thread angle of the second screw threads is smaller than that of the thread angle of the first screw threads, the multiple second screw threads and the adjacent first screw threads jointly form a plurality of spiral anti-loosening grooves, and the multiple anti-loosening grooves are evenly formed along the surface of the thread section. The car door lock mounting bolt is low in cost and can play roles in preventing loosening, resisting water and preventing paint from being damaged.

Description

technical field [0001] The invention relates to a fastener, in particular to a door lock mounting bolt. Background technique [0002] Bolts are the most commonly used fasteners in automobiles. They are simple in structure and easy to use, and are widely used in various occasions. However, in some occasions where there is vibration, the bolts used for fastening will loosen, resulting in disengagement of the connection, failure of the mechanism, and even safety accidents. Therefore, it is extremely important to manufacture bolts that can effectively prevent loosening. [0003] Traditional automobile door lock mounting bolts generally adopt bolts without anti-loosening structure or bolts with anti-loosening structure, such as: anti-loosening bolts with elastic washers or with chemical glue solutions. see figure 1 , The mounting bolts of automobile door locks without anti-loosening structure may be affected by driving vibration or door opening and closing vibration during use,...

AI Technical Summary

Problems solved by technology

see figure 1 , the car door lock mounting bolts without anti-loosening structure may be affected by driving vibration or door opening and closing vibration during use, and there may be a risk of loosening and falling off, which has been basically abandoned at present

see figure 2 , the anti-loosening bolt with elastic washer structure, the elastic washer is usually a wave washer, the wave washer is deformed and rotated during the tightening process, it is easy to rub and interfere with the inner panel of the car door, causing damage to the paint, and it is used less and less

see image 3 At present, most of the anti-loosening bolts of automobile door locks are chemical glue anti-loosening bolts. Chemical anti-loosening glue is applied to the thread of the bolts. After tightening, it will solidify in the thread gap to form a strong plastic film, so that the bolts are locked. Not loose, but this kind of chemical glue has a technical monopoly, or the bolt manufacturer has no corresponding glue application equipment or conditions, and there are problems of repeated logistics and high cost

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