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Passive type theftproof bolt and nut

An anti-theft bolt, passive technology, applied in the direction of nuts, bolts, screws, etc., can solve the problem of inconvenient operation and achieve the effect of strengthening the anti-theft ability

Inactive Publication Date: 2010-06-16
杨杉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the bolts and nuts used to fasten parts or components placed on outdoor facilities from being disassembled by others, people currently solve the problem by welding the bolts and nuts together, which is inconvenient in operation. After welding, if the welded parts or components become loose, they cannot be retightened

Method used

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  • Passive type theftproof bolt and nut
  • Passive type theftproof bolt and nut
  • Passive type theftproof bolt and nut

Examples

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Embodiment Construction

[0013] Describe the present invention in detail below in conjunction with accompanying drawing:

[0014] Such as Figure 1-3 As shown, a passive anti-theft bolt and nut include a screw head 1, a screw rod 2, and a nut 3. There are 4-12 helical teeth 4 on the surface, between the helical teeth 4 and the bolt axis a=0°-20°, in this embodiment there are 8 helical teeth 4, the helical teeth 4 and the bolt axis a =15°; anti-loosening teeth 5 are arranged on the bottom surface of the screw head 1 and the nut 3 matched with the workpiece, and the cross-sections of the helical teeth 4 and the anti-loosening teeth 5 are serrated. One tooth surface of the serrated helical tooth 4 and the anti-loosening tooth 5 is a straight wall surface, which is perpendicular to the bottom surface of the dedendum, and the straight wall surface is arranged in a screw-in direction, and the screw-in direction is clockwise.

[0015] When installing, use a special tool for the special sleeve, and set a mo...

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Abstract

The invention relates to passive type theftproof bolt and nut which are characterized in that basis profiles of a screw head and the nut are set as conical surfaces; the conical surfaces of the screw head and the nut are provided with 4-12 helical teeth; the bottom surfaces of the screw head and the nut, which are matched with workpieces, are provided with anti-loosing teeth; and the cross sections of the helical teeth and the anti-loosing teeth are in sawteeth shapes. Because the helical teeth are only provided with strength points in a screwing direction but not the strength points in an outwards screwing direction, not only can a conventional manual tool not completely disassemble the bolt and the nut, but also a special tool used for the passive type theftproof bolt and nut can also not disassemble the bolt and the nut, but when a part or a member used for a long time is loose, the special tool can also be used for further tightening the part or the member; and because the bottom surfaces of the screw head and the nut, which are matched with workpieces, are provided with the anti-loosing teeth, the fastened anti-loosing teeth are tightly meshed with the contact surfaces of the workpieces and are firmly buckled with the surfaces of the workpieces like pawls of a ratchet wheel, thus the invention has good theftproof effect.

Description

Technical field: [0001] The invention relates to a fastener, in particular to a passive anti-theft bolt and nut. Background technique: [0002] Bolts and nuts are currently commonly used fasteners and are widely used to fasten parts or components. Existing screw heads and nuts are in the shape of hexagonal columns, which can be tightened or loosened by using existing common tools. When the existing bolts and nuts are placed outdoors to fasten parts or components, they are often Workpieces and equipment were stolen, which made the facilities and equipment unable to operate normally and safely. For example: various workpieces of power communication towers, angle steel parts of observation towers for military observation stations, power transformers, unattended communication base stations, steel guardrails for highways, permanent metal parts of railway bridges, field oil transportation, gas pipeline guardrails The phenomenon of being stolen from time to time constitutes a cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B41/00F16B23/00F16B37/00
Inventor 杨杉
Owner 杨杉
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