CN2890464Y - Anti-detaching bolt - Google Patents

Abstract

The utility model discloses a fastening piece, in particular to an anti-detaching bolt, which comprises a screw rod (2) and a screw cap (1) connected to the screw rod (2). The utility model is characterized in that the outer flank of the screw cap (1) is a polygon whose side number is odd . Compared with the prior art, as the outer flank of the screw cap (1) is a polygon whose side number is odd, namely the opposite of each side is an angularity, normal spanners are not possible for turning the screw cap. Once the screw cap is fastened, it is vary hard to be detached, which effectively prevents stealing, in particularly applicable for fastening open-air electric facilities and other equipments.

Description

The nti-removing nut bolt

Technical field:

The utility model relates to a kind of fastening piece, and particularly a kind of nti-removing nut bolt mainly is to match with nut to be used to prevent that bolt or nut are by occasion that other people unload.

Background technique:

Bolt is widely used as fastening piece, and the structure of existing bolt is that a screw mandrel is arranged, and in the termination of screw mandrel nut is arranged, and screw mandrel and nut are structure as a whole.The outer side of nut is processed into equilateral Hexagon mostly or quadrilateral is used for the spanner twisting.This bolt is not suitable for anti-unloading occasion, because be easy to unload with spanner, particularly fastening as the field electric facility more can not be used this common bolt.In order to address the above problem, the interior threaded hole place at the nut that matches with bolt that has radially is processed with groove, in groove, be provided with elastic component and ball, the degree of depth of groove is a gradual change shape, depth dimensions than the depths is consistent with the diameter of ball, when swivel nut on bolt, ball contacts with bolt to be driven by friction and presses to elastic component and make ball enter groove than the depths, do not influence the screw-in nut this moment, after fastening, as rotating nut round about, because the effect of elastic component, ball can be pressed to bolt, make ball shift to the more shallow place of groove and squeeze between nut and bolt, causing can not rotating nut, reach the purpose of blocking and antiunloading, the nut of this structure, be used in field electric facility or other equipment fastening more, according to the application in the practice, because the outside of nut is Hexagon or quadrilateral that available spanner rotates, if use the arm of force long and have the spanner of enough moments of torsion also can destroy the bolt and nut fastening piece of this structure, as twist off bolt or thoroughly destroy screw thread it is come off etc., finally reach the purpose that unloads, therefore, the anti-effect of unloading of existing bolt is unsatisfactory.

Summary of the invention:

The purpose of this utility model provides a kind of nti-removing nut bolt that common spanner can not rotating bolt that uses, and overcomes the deficiencies in the prior art.

Technical solution of the present utility model is: a kind of nti-removing nut bolt, it comprises screw mandrel 2 and the nut 1 that is connected with screw mandrel 2, it is characterized in that: the outside of nut 1 is the polygonal of odd number for the limit number.

The polygonal of described odd number is five limits or seven limits or nine limits or ten one side.

Described polygonal is an equilateral polygon.

The utility model compared with prior art, because the outside of nut 1 is the polygonal of odd number for the limit number, promptly Yi Bian opposite is a horn shape, can not use common spanner to rotate, be difficult to after fastening unload, prevented from effectively to be unloaded, be particularly suitable in the open air electric power facility and other equipment fastening by other people.

Description of drawings:

Fig. 1 is that the master of the utility model embodiment looks schematic representation;

Fig. 2 is that K shown in Figure 1 is to schematic representation.

Embodiment:

As shown in the figure: 2 is screw mandrel, is processed with screw thread on screw mandrel 2.Be connected with nut 1 with screw mandrel 2, the outer side of nut 1 is processed into polygonal, its polygonal limit number is 11, the limit number also can be 5 or 7 or 9, described polygonal is equilateral polygonal, also can be unequal-sided irregular polygon, and promptly wherein the opposite on one side is a horn shape, when cooperating rotation fastening with nut, utilize the special tool that matches with polygonal to get final product.Promptly in use prevented from effectively after fastening to unload with general tool, both just used the grow up common spanner of moment of torsion of the arm of force to destroy the structure of bolts and nuts, the Yin Putong spanner can't match with nut, so can't realize.

Claims (3)

1, a kind of nti-removing nut bolt, it comprises screw mandrel [2] and the nut [1] that is connected with screw mandrel [2], it is characterized in that: the outside of nut [1] is the polygonal of odd number for the limit number.

2, nti-removing nut bolt according to claim 1 is characterized in that: the polygonal of described odd number is five limits or seven limits or nine limits or ten one side.

3, nti-removing nut bolt according to claim 2 is characterized in that: described polygonal is an equilateral polygon.

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