Detachable anti-loosing and anti-theft bolt structure
A technology of anti-theft bolts and bolts, applied in the direction of bolts, screws, nuts, etc., can solve the problems of difficult processing, high cost, complex structure, etc., and achieve the effects of avoiding destructive disassembly, high anti-theft and anti-theft, and reducing waste
Inactive Publication Date: 2012-09-26
赵群燕
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Problems solved by technology
Therefore, in addition to being irreversible, the current technical solution also has defects such as complex structure, difficult processing, and relatively high cost.
Method used
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[0015] With reference to accompanying drawing, the thickness of nut 2 of the present invention should be greater than the length of bolt lower section, to reserve several circles of internal threads at the upper end to correspond to the upper section external thread of bolt, for locking purposes. The head of the standard part bolt 1 is processed with a machine tool to reduce the diameter, and the diameter reduction is slightly larger than the thread depth of the screw thread, so as not to contact with the screw thread of the nut when extending into the nut. The reduced-diameter section is called the upper section, and the non-shrinked-diameter section is called the lower section. The length of the upper section is preferably 1-3 pitches, and the lower section is a fastening function section that cooperates with the nut thread. First stagger half the pitch in the upper section to process 1-3 turns of thread, and the threads in the upper and lower sections are the same. In this w...
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The invention relates to a fastening piece, in particularly a detachable anti-loosing and anti-theft bolt structure. The detachable anti-loosing and anti-theft bolt structure mainly comprises a bolt and a nut, and is characterized in that a threaded section of the bolt comprises an upper section and a lower section which are fabricated integrally; threads of the upper section and the lower section are same; the diameter of the upper section is smaller than that of the lower section to ensure that the threads of the upper section does not contact the threads of the nut; the threads of the upper section and the threads of the lower section are staggered for a half screw pitch to ensure that gear peaks and gear valleys of the threads of the upper section are opposite to gear peaks and gear valleys of the threads of the nut; a snap spring which is made of a shape memory alloy material is accommodated in a space which is formed by at least one circumferential gear valley; and the threads of the lower section of the bolt are matched with the threads of the nut. The detachable anti-loosing and anti-theft bolt structure can be screwed down by using a standard tool to realize a reliable self-locking function, and the nut cannot become loosed automatically, so that the detachable anti-loosing and anti-theft bolt structure has high anti-loosing and anti-theft function. When the detachable anti-loosing and anti-theft bolt structure is required to be disassembled, the nut is heated to ensure that the snap spring is separated from the nut, and then the bolt can be unscrewed by using a wrench, so that the conventional destructive disassembly is avoided, and waste is reduced.
Description
technical field [0001] The invention relates to a fastener, in particular to a detachable anti-theft bolt. Background technique [0002] Bolts are the most commonly used fasteners. They can be tightened or disassembled by standard tools such as wrenches, and can be widely used in various occasions that require fastening. Many outdoor electrical appliances or devices are fixed with bolts, such as motor vehicle license plates, wheels, storage batteries, street lamp electrical appliances, transformers, air conditioner external units, etc., which can be disassembled by thieves only with a wrench. There are many kinds of anti-theft bolts in the prior art. Most of the anti-theft bolts change the hexagonal nut to a special shape without a force point for reverse rotation, or the hexagonal nut is twisted off, such as a kind of anti-disassembly bolt disclosed in Chinese patent 200910191325.1 shown. These schemes all make the bolts permanently non-removable, but in fact more devices...
Claims
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Inventor 赵群燕
Owner 赵群燕