CN2463592Y - Expansion bolt - Google Patents

Abstract

The utility model provides an expansion bolt which comprises a metal bolt, a metal sleeve tube and a butterfly-shaped nut. The utility model is characterized in that the butterfly-shaped nut forms a shape like a round platform, two butterfly wings are arranged in the symmetrical center of an outer wall, and a standard female screw is arranged in a central through hole and is matched with the metal bolt. The metal sleeve tube forms a shape like a hollow cylinder shape, four channels are milled evenly at one end of the metal sleeve tube, and the width of each channel is a little bit greater than the thickness of each butterfly wing, and the inner diameter of the metal sleeve tube is greater than that of a small end and is smaller than that of a big end. When the utility model is used, the wings of the butterfly-shaped nut are clamped in the grooves at one end of the metal sleeve tube and stayed in a wall, and the metal bolt is screw in the butterfly-shaped nut from the metal sleeve tube to fasten articles. The utility model is suitable for fastening articles and devices which are on the wall.

Description

EXPANSION ANCHOR BOLTS

The utility model provides a kind of hardware products, especially a kind of the weight body is anchored on EXPANSION ANCHOR BOLTS on the wall.

Traditional expansion bolt has two big classes.The first kind comprises three parts: the threaded metal bolts of first portion's criteria of right and wrong, its afterbody have a coniform part of expanding; Second portion is the metal sleeve of an end jag; Third part is a standard piece, i.e. hexagon nut, plain washer and spring washer.A defective of this class EXPANSION ANCHOR BOLTS is that threaded in use metal bolts stretches out metope, nut tighten more stretch out many more; If dismounting then will forever stay the bolt microcephaly who stretches out on the wall, neither attractive in appearancely be in the way again.The second class EXPANSION ANCHOR BOLTS is made up of two-part: a part is the soft plastic expansion sleeve, and with wood screw distending expansion sleeve, though expose for a short time, load force is less during use, and fastened object easily comes off from body of wall.

The purpose of this utility model provides a kind of EXPANSION ANCHOR BOLTS, and it can be anchored on object on the wall, bolt can not exposed outside the wall again.

The utility model is realized by following method:

At first be to buy or oneself process to meet the metal bolts of NBS, and optionally mix the plain washer of same size; Second portion is a kind of metal sleeve of design, and profile is a hollow cylindrical, and the one end evenly distributes and offers four strias, and slot length and metal bolts reach are about equally; Third part is a kind of wing nut of design, and its profile is hollow round platform, and central through bore has the female thread of standard, and is supporting with metal bolts, and round platform outer wall bilateral symmetry has two butterfly wings in the center, and it is wide that butterfly wing thickness should be slightly less than metal sleeve one end slot.The metal sleeve internal diameter greater than the wing nut small head external diameter less than the external diameter of major part.When using, embed wing nut in the groove that metal sleeve one end offers and stay within the walls, again metal bolts is got final product from the inner wing nut that screws in of metal sleeve.

The utility model has the advantages that: the one, because the butterfly wing of wing nut tightly is stuck in the metal sleeve groove, thereby wing nut can not rotate when screwing in metal bolts, article can be anchored on the wall; The 2nd, stay wall outer only be the cap head of metal bolts, expose lessly, be that countersunk head then embeds fully not have and exposes as the cap head; The 3rd, the outer no any residue of dismounting back wall.

Figure of description 1 is the utility model structural representation.

Figure of description 2 is the wing nut side view.

Figure of description 3 is the wing nut plan view.

Figure of description 4 is for using the hex head bolt scheme of installation.

Figure of description 5 is for using the countersunk screw scheme of installation.

Number in the figure (1) is a wing nut, and (2) are the butterfly wing, and (3) are groove, and (4) are metal sleeve, and (5) are metal bolts, and (6) are body of wall, (7) object for being fixed.

Implementation process of the present utility model is: purchase or processing meet the metal bolts (5) of NBS, and metal bolts (5) cap head is outer-hexagonal, interior hexagonal or countersunk head; The mould of design wing nut (1), with cold pier or extrusion process, it is a frustoconic shape, and central through bore has the female thread of standard, and is supporting with metal bolts (5), and round platform outer wall symmetry center has two butterfly wings (2); Select for use the metal circular tube of certain wall thickness to make metal sleeve (4), the one end mill goes out equally distributed four grooves (3), groove (3) width is slightly larger than the thickness of butterfly wing (2), length is suitable, metal sleeve (4) internal diameter is greater than wing nut (1) small head external diameter, assembling at last, and look concrete condition and mix plain washer and spring washer.

Claims (1)

1. A kind of EXPANSION ANCHOR BOLTS, it comprises by wing nut (1), metal sleeve (4), metal bolts (5) formation, it is characterized in that:

   A: wing nut (1) is a frustoconic shape, and there are two butterfly wings (2) at its outer wall bilateral symmetry center, and central through bore has standard female threaded, and is supporting with metal bolts (5);

   B: metal sleeve (4) be cylindrical its internal diameter less than large head external diameter, an end evenly mills out four grooves (3) greater than wing nut (1) small head external diameter, groove (3) width is slightly larger than the thickness of butterfly wing (2).

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