CN2064835U - Antitheft non-standard nut and its special purpose box spanner - Google Patents

Abstract

The utility model relates to an anti-theft non-standard nut and a special purpose box spanner which is exclusively used for the anti-theft non-standard nut, which is a special purpose fastener and a matching tool. The nut transits gradually from polygon shape to circle, from large to small, from the lower bottom surface to the upper bottom surface along the contour line of each cross section, and the periphery of the polygon shape is a curve. Along the axial bus bar, the nut of the curve used as the fastener and the box spanner which is composed of a sleeve barrel (8) matching with the nut, a simultaneous nut (11), a steel ball (9), a sleeve ring (10) and an end cover (12) used as the matching tool are applied to the machinery equipment and facilities which need antitheft, particularly the iron tower of the power line. The nut and box spanner have large antitheft coefficient, easy fabrication, and simple operation.

Description

Antitheft non-standard nut and its special purpose box spanner

The utility model relates to fastening piece and is exclusively used in the mounting or dismounting tools of this fastening piece.Particularly be applicable to need to take precautions against to be caused the stolen machinery of component, facility, as the antitheft needs on the iron tower of power circuit because of nut unloads.

In the nut of prior art, standard cap is because of its mounting or dismounting tools highly versatile, and not being suitable for needs to make fastening piece on antitheft machinery, the facility.Original anti-theft screw cap can divide two classes, one class is that the prism of hexagonal or four jiaos is made into cylindrical body, fluting or punching on upper bottom surface or circumference then, so that special tool loading and unloading, because of having two relative planes, it can not supply the spanner clamping, therefore played certain antitheft effect, but it can't prevent that other people from adopting pipe tongs and so on instrument turn and moving with groove or Kong Weizhi pointing chisel, antitheft safety factor obviously reduces greatly.Another kind of anti-theft screw cap promptly on the outer mask of standard cap upper shield cup-shaped or other shapes prevent to be dismantled by common wrench, yet because the nut in the cover still is the hexagonal standard piece, can be dismantled by instruments such as human socket wrenchs in the same old way, so antitheft safety factor is not high yet, increase a upper shield still more and increased cost of production, unfavorable in enterprise.

The purpose of this utility model is for fear of the deficiencies in the prior art and provide a kind of socket wrench that does not increase the good a kind of antitheft special-shaped nut easy and simple to handle of cost, theftproof performance and be exclusively used in this nut to society.

Description of drawings.

Fig. 1 is prismatoidal nut front view for shape of cross section.

Fig. 2 is the nut front view of four prismatics for shape of cross section.

Fig. 3 is the nut front view of five prismatics for shape of cross section.

Fig. 4 is the nut front view of six prismatics for shape of cross section.

Fig. 5 is the sectional side view of the nut of taper type curve for axial bus.

Fig. 6 is the sectional side view of the nut of bulb-type curve for axial bus.

Fig. 7 is the socket wrench structural representation.

Make following detailed description according to above-mentioned accompanying drawing embodiment.

The technical solution of the utility model is to realize like this, antitheft special-shaped nut 1(is referring to Fig. 1-6) be designed to each cross-sectional profiles line from bottom surface to upper bottom surface from big to small gradually by many prismatics to circular transition, the periphery of many prismatics is a curve, described many prismatics have prismatic 2 or four prismatics 3 or five prismatics 4 or six prismatics 5 etc. to circular transition, its axial bus has taper type curve 6 or bulb-type curve 7, this nut 1 removes last, down outside two bottom planes, whole profile is without any the face of opposing parallel and the seamed edge of opposing parallel, all become arc transition between the concavo-convex and corner angle not significantly, rib and rib.But this nut 1 die-forging forming, internal thread are pressed standard thread processing.

Socket wrench (referring to Fig. 7) aims at antitheft special-shaped nut and supporting design.Hole shape and nut 1 form structure are complementary in the head of sleeve 8, promptly fit mutually, can drive nut 1 and rotate, and the steel ball through hole of interior omoplate structure and radial equipartition is arranged on the sleeve 8.Synchronous nut 11 in the sleeve 8 also has the outer omoplate that combines with omoplate in it, on the position of nut 11 with respect to sleeve 8 steel ball holes the shrinkage pool that is several times as much as steel ball number is arranged synchronously, to improve the locking probability, the pressed from both sides plane structure of its tail end has the cubic or flat department of six sides, use for the common wrench operation, the internal thread of its head and nut 1 same specification are to bear sleeve 8 and the end thrust that nut 1 produces when twisting, unlikely skidding when guaranteeing sleeve 8 with nut 1 applying.Steel ball 9 is contained in the steel ball hole of sleeve 8 and synchronous nut 11, at least three of the quantity of steel ball 9, the sleeve 8 outer lassos 10 that inclined-plane in the band is housed, lasso 10 can be on sleeve 8 move left and right, constitute locking mechanism with steel ball 9, the tail end of sleeve 8 fastening end cap 12, prevent that synchronous nut 11 and lasso 10 from can outwards not skid off.

When clockwise direction during with synchronous nut 11 screws in antitheft special-shaped nut screws mutually double-screw bolt sponson, having promoted sleeve 8 moves to left and entangles and be fitted on the antitheft special-shaped nut 1, be moved to the left lasso 10 then, utilize that the inclined-plane pushes the shrinkage pool of synchronous nut 11 with three steel balls 9 in its circle, make synchronous nut 11 sealed with sleeve 8.At this moment need only tail end,, just can tighten or unscrew antitheft special-shaped nut 1 by the transmission of steel ball 9 power with the synchronous nut 11 of any loading and unloading spanner turn.Work finishes, as long as promote lasso 10 to the right, makes steel ball 9 leave shrinkage pool, and the synchronous nut 11 of counter-clockwise then turn can withdraw from the entire sleeve spanner.

Antitheft special-shaped nut and the box spanner that is exclusively used in this nut by the utility model design, because the whole profile of its nut is the plane except the upper and lower end, face and seamed edge without any opposing parallel, significantly concavo-convex and corner angle do not appear yet, because shape is special, so extracting tool commonly used all can't be turned on it, so good anti-theft effect, easy to manufacture, easy and simple to handle, be applicable to need to take precautions against be caused the stolen plant equipment of other parts, facility because nut unloads, be specially adapted to the application on the iron tower of power circuit.

Claims (5)

1, a kind of antitheft special-shaped nut is characterized in that the profile line of each cross section of this nut (1) is curve by many prismatics to the periphery of circular transition, many prismatics from bottom surface to upper bottom surface from big to small gradually, and bus vertically also is a curve.

2, nut as claimed in claim 1 is characterized in that described many prismatics can be prismatic (2) or four prismatics (3) or five prismatics (4) or six prismatics (5).

3, nut as claimed in claim 1 is characterized in that curved axial bus can be taper type curve (6) or bulb-type curve (7).

4, a kind of socket wrench that is exclusively used in the described nut of claim 1, it is characterized in that the sleeve (8) that this socket wrench has a head endoporus shape and nut form structure to be complementary, be equipped with in the sleeve (8) that the tail end band can press from both sides plane structure, head has and the synchronous nut (11) of nut (1) same specification internal thread, between sleeve (8) and the synchronous nut (11) at least three radially uniform steel balls (9) are housed, the outer lasso (10) that is equipped with of sleeve (8).

5, socket wrench as claimed in claim 4 is characterized in that at sleeve (8) afterbody end cap (12) being housed.