Anti-derotation screw capable of cooperating with hole depth

Abstract

The invention discloses an anti-derotation screw capable of cooperating with the hole depth. The anti-derotation screw comprises a screw body, a screw head assembly and a return stroke block assembly.The screw head assembly is arranged on the top of the screw body. The return stroke block assembly is arranged in the screw body. The screw head assembly comprises a screw head, a button, a spring A,a gear, a limiting rod A, a guide column A, an inner wall hole, a limiting rod B, a positioning protrusion, a connecting rod, a lug B and a guide column B. The return stroke block assembly comprisesa cylindrical guide rod, a telescopic rod, a spring B, an annular lug A, a return stroke block and a return stroke block bottom hole. Through the joint effect of the screw body, the screw head assembly and the return stroke block assembly, the problem of serious adverse consequences caused by structure collapse caused by screw derotation is solved; and the problem that when threads are located below a hole, the hole is deep, and a screw head is not long enough, a screw is not easily stabilized by hand when the screw is just screwed in is further solved.

Description

technical field [0001] The invention relates to the technical field of fasteners, and in particular provides an anti-rotation screw that can match the depth of a hole. Background technique [0002] Fasteners are a type of mechanical parts used for fastening connections and are widely used; fasteners are used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, etc. A variety of fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, instruments and supplies, and are the most widely used mechanical basic parts. ; It is characterized by a wide variety of specifications, different performances and uses, and a high degree of standardization, serialization, and generalization. [0003] Screws are a common fastener widely used in machinery, electrical appliances and buildings. The general material is metal o...

AI Technical Summary

Problems solved by technology

The general material is metal or plastic, which is cylindrical, and the surface is engraved with concave-convex grooves called threads; with the advancement of social science and technology, the mechanization and automation of industrial and agricultural production have increased rapidly, and higher requirements have been put forward for the safety of mechanical equipment. It is necessary to prevent anti-rotation of the screws, but the screws on the market cannot prevent anti-rotation, so accidents, theft, and intentional screwing out of the screws will lead to the collapse of the connected structure and cause various unpredictable consequences

[0004] Ordinary screws cannot be turned back, so accidents, theft, and intentional unscrewing of the screws will cause various unpredictable consequences, and the structure of the connection will collapse, and ordinary screws cannot freely fit holes with different depths.

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