A screw fastening component that never loosens

Abstract

The invention discloses a screw fastening assembly with a loosening prevention function, and belongs to the technical field of fasteners. The screw fastening assembly is characterized in that a threaded rod of a screw is composed of two threaded rod bodies with different diameters and thread screwing directions. According to the fastening mode, the screw fastening assembly is divided into two types, namely a fastening assembly with different-diameter reverse-screwing same-body two-section screw, and a fastening assembly with two different-diameter reverse-screwing different-body screws; as forthe fastening assembly with the different-diameter reverse-screwing same-body two-section screw, the threaded rod of one screw of the assembly is divided into two sections with different diameters and revere screwing directions, and the fastening assembly further comprises two nuts with different inner diameters and reverse thread screwing directions, wherein the nuts are matched with the two sections of threaded rod bodies; as for the two different-diameter reverse-screwing different-body screws, the threaded rods of the two screws of the assembly are different in diameter and reverse in screwing direction, the thread rod of the small screw penetrates through a through hole formed in the longitudinal axis of the large screw, and the two screws are matched with two sections of inner threads with different inner diameters and reverse screwing directions in a blind hole of a component; and the two types of screws are matched with proper locking clamps to lock the relative position afterthe two nuts or the two threaded rod bodies are fastened. According to the technical scheme of the screw fastening assembly, after the component is fastened, the two nuts or the two threaded rod bodies can generate the mutually contradictory loosening and rotating trend under the effect of vibrating force, the loosening prevention function is achieved, and dismounting is convenient.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to a screw fastening assembly that never loosens. Background technique [0002] Screw fastening components are a type of mechanical parts used to fasten two or more components when they are connected as a whole. The threaded rod at the core of the screw is a cylinder with threads on the outside. According to the shape and use, it can be divided into three types: bolt (screw with end cap), stud (screw without end cap), and screw (pointed screw with end cap). As a mature industry, the screw fastener industry has been standardized for decades. However, the problem of anti-loosening of screw fasteners has not been fundamentally and effectively solved. Solving the problem of anti-loosening in the field of screw fasteners is not only The huge problem of the firmware industry is also a huge problem of the entire machinery industry. The solution to the problem of anti-loosening of screw...

AI Technical Summary

Problems solved by technology

[0004] The anti-loosening screws commonly used in the industry now basically belong to the above 4 similar products. The first type of mechanical anti-loosening is actually not anti-loosening but to avoid falling off; the second type of riveting anti-loosening bolt rod can only be used once and repaired It is difficult to disassemble, and cutting tools are necessary to destroy the bolts; the third type of friction and anti-loosening products such as Japanese Hadlock eccentric nuts and Spirax wedge lock nuts only increase the loosening resistance, and will also loosen and fall off when the vibration of the component is large enough; Type 4 structure anti-loosening types such as Down lock nuts and bolt rods are extremely difficult to process. In addition, it should be noted that the vibration force can be transmitted between components, and the vibration force will be transmitted from the component to the first nut on the inside and then transmitted. Give the second nut to the outer end. When the vibration force is strong enough, the transmitted vibration force can make the outer end nut loose first, and then the inner nut loosen, and the two nuts will loosen and fall off in turn.

[0005] For anti-loosening screws that can be directly loosened with the help of tools such as wrenches, when the vibration force of the component is large enough to the same force as the tools and tools, the screws will also loosen and fall off, and the effect of never loosening cannot be achieved.

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