CN2186818Y

CN2186818Y - Anti-theft nut

Info

Publication number: CN2186818Y
Application number: CN 94225939
Authority: CN
Inventors: 刘宏伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-16
Filing date: 1994-03-16
Publication date: 1995-01-04
Anticipated expiration: 2004-03-16

Abstract

The utility model discloses an anti-theft screw nut, being composed of a screw nut (1) and a pin nail (2). A longitudinal key groove (U) is opened on an inner screw hole of the screw nut (1), one end of the pin nail (2) is provided with a tip and the other end is a flat head. When the utility model is used, the screw nut (1) and the screw bolt (3) are tightly screwed and adjusted, the pin nail (2) is beaten into the key groove (U) of the screw nut, the pin nail (2) is embedded into a screw thread of the screw bolt (3), the screw nut (1) and the screw bolt (3) can not generate the corresponding rotation with a fastening and an anti-theft functions. The utility model has the advantages of simple structure, easy manufacture, low cost and convenient installation and use. Because the utility model can not be demounted, the utility model is only suitable for a permanent fixing occasion for once use.

Description

Anti-theft nut

The utility model relates to the mechanical connection fastening piece.

In the mechanical connection fastening piece, bolt nut is the most general the most frequently used, becomes standard piece already, and is very easy to use.Existing bolt, nut are to be used, dismounting, install all fairly simple, as long as have spanner or pliers just can to unscrew or tighten.But can only tighten fixingly at needs, when not needing to dismantle after can not becoming flexible and install, this structure does not reach requirement, and be usually stolen, destroyed, and influence is used.Such as the clamping bolt nut of using on electric power transmission line tower bar and the distaff, often the more than ten years do not need to change again after installing.If generation is loosening or robbed or burgled, may cause a serious accident, in case find to change, assort, tighten reinforcing at once.But in some remote mountain areas, rural area, it is untimely to patrol, and the stolen phenomenon of nut is many, has formed accident potential, just collapses easily if rainstorm tower bar takes place, and causes power supply to interrupt, and influences economic construction and people's lives, also is unsafe factor.

The purpose of this utility model just provides a kind of simple in structurely, easy to use, and the safe antitheft performance is good, and cost is suitable, the fastening piece that is easy to promote.

Task of the present utility model is finished like this, on existing standard spare nut basis, improved, designed a kind of anti-theft screw cap, formed by nut (1) and pin (2), have one on the inner bolt hole of nut (1) and vertically run through keyway (U), can match with pin (2).The sectional shape of the vertical keyway of nut (1) inner bolt hole (U) is a circular arc, pin (2) one end band points, and an end is a tack.During use nut (1) and bolt (3) tightened and adjust, nut keyway (U) is inserted at the tip of pin (2), pound into hammer.Pin (2) imbeds in the screw thread of bolt (3) like this, tightly blocks, and makes between bolt (3) and the nut (1) to produce relative rotation, and plays fastening antitheft effect.Because pin (2) is whole all to be pounded in the nut keyway (U), thus can't transfer to, very reliable.In order to make nut (1) keep intensity, keyway (U) is preferably left on inner bolt hole along the edges and corners of hexagon nut (1).Simultaneously, pin (2) will select for use the steel higher than bolt (3), nut (1) hardness to make, and guarantees pin (2) all to be pounded into keyway (U) when mounted, is embedded in the screw thread.Because nut (1) and steel supply are all very abundant, so processing and fabricating is very convenient.The nut of replacing simultaneously also can be processed into anti-theft screw cap (1), both economical practicality.Owing to can not dismantle, so only be suitable for the disposable application of permanent fastening occasion.

Design and produce, test according to above-mentioned, prove the utility model making simple in structure, easy, cost is low, effective, and is easy to install, can play antitheft effect effectively.Be easy to apply, reached preferably and given the phase purpose in relevant field.

Below accompanying drawing is illustrated:

Fig. 1 is the utility model assembling condition schematic representation;

Fig. 2 is the utility model nut (1) plan view.

Among the figure, 1-nut, 2-pin, 3-bolt; The U-keyway.

The utility model is described in further detail by embodiment at last.

Select the M16 nut for use, in the edges and corners of hexagonal, process the keyway of wide 2mm together with planer on inner bolt hole, run through whole nut, bottom land is circular-arc.Be processed into the pin (also can select commercially available same specification steel nail for use) of φ 2mm with the 45# steel, during use, adjust nut and bolt earlier and cooperate and tighten, with hammer pin is pounded into keyway then and fixed.Whole pin is actually in the screw thread that is embedded in bolt after all pounding into keyway, does not appear basically in the nut both ends of the surface.Nut just can't turn like this, and pin unloads to get off yet, and the fixing bolt nut reaches antitheft purpose firmly.The whole cost of this anti-theft screw cap is 0.40-0.50 unit only, the cost less, effective, for not dismantling and unattended occasion, the safe antitheft effect is very remarkable.Special power supply line's tower bar that sets up in the open air and distaff adopt the utility model fastening, promptly guarantee safety, avoid theft, and have saved great amount of manpower and material resources again, can guarantee effectively to power to arrange normal operation.

Claims

1, a kind of anti-theft screw cap is characterized in that being made up of nut (1) and pin (2), has one on the inner bolt hole of nut (1) and vertically runs through keyway (U), can match with pin (2).

2, according to the described anti-theft screw cap of claim 1, the sectional shape that it is characterized in that the vertical keyway of said nut (1) inner bolt hole (U) is a circular arc.

3, according to the described anti-theft screw cap of claim 1, it is characterized in that said pin (2) one end band points, an end is a tack.