CN2196203Y

CN2196203Y - Metallic expansive screw

Info

Publication number: CN2196203Y
Application number: CN 94238975
Authority: CN
Inventors: 何鸿祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-29
Filing date: 1994-06-29
Publication date: 1995-05-03
Anticipated expiration: 2004-06-29

Abstract

The utility model discloses a metal expansion screw, relating to a building fastening piece. The utility model mainly solves the problems that the beauty is affected, the disassembling and assembling are inconvenient, etc. when an expansion screw is used. The utility model is composed of a screw bolt (1), a metal expansion tube (2), a cone-shaped screw nut (3), washers (4) and (5), etc. The inner wall and the outer wall of the cone-shaped screw nut (3) are provided with screw threads respectively fitting an outer screw thread of a screw bolt (1) and an inner wall of the metal expansion tube (2). The utility model can be conveniently disassembled and assembled, when the utility model is used, the surface of a fastened object is neat and beautiful. The utility model is suitable for the fields, such as building, advertisement, decoration, etc.

Description

Metallic expansive screw

A kind of expansion of metal screw, relate to building field.

At present, the widely used expansion of metal screw of people, after installation, bolt is stayed fastened body surface one and is cut greatly, hinder attractive in appearance, and dismounting inconvenience.

The purpose of this utility model is to be to design a kind of easy accessibility, again a kind of expansion of metal screw of harmless architectural appearance.

The purpose of this utility model is to realize like this;

It includes annex packing ring (4), spring washer (5), bolt (1), metal expansion pipe (2), tapered cup nut (3), and, the lower end of said bolt (1) has outside thread; The inwall of the expandable end of metal expansion pipe (2) fluting has interior ripple; The inwall of tapered cup nut (3) has screw thread, and outer wall has ripple, also has taper muscle (6) on the outer wall; Tapered cup nut (3) is connected with metal expansion pipe (2) by outer ripple, the outside thread of the inner thread of tapered cup nut (3) and bolt (1) matches, bolt (1) drives tapered cup nut (3) by outside thread, tapered cup nut (3) hangs in metal expansion pipe (2) expands metal expansion pipe (2) lower end, thereby be fixed in the exterior object, simultaneously, taper muscle (6) on the tapered cup nut (3) embeds in the groove of being opened on the metal expansion pipe (2), tapered cup nut (3) is closely linked to each other with metal expansion pipe (2), when screwing, nut (3) can not rotate simultaneously with nut (1) at bolt (1).

The utility model is installed through using, because bolt (1) is to stretch to metal tube (2) by fastened thing, tapered cup nut (3) is buckled in metal tube (2) bottom, so bolt head is only left on fastened thing surface, and harmless architectural appearance, and easy accessibility.

The utility model is described in further detail below in conjunction with drawings and Examples;

Fig. 1 is the utility model structural representation.

1 is that bolt, 2 is that metal expansion pipe, 3 is that tapered cup nut, 4 is that annex packing ring, 5 is that spring washer, 6 is the taper muscle among the figure.

Bolt (1) is by the screw of fastened thing, extending into metal expansion pipe (2) female (3) can not rotate simultaneously with bolt (1), make bolt (1), nut (3) revolve tighter and tighter, tapered cup nut (3) hangs in the metal tube (2), and expanded metal pipe (2) plays snap action.

If remove fastened thing, only need bolt (1) is screwed off, metal expansion pipe (2) reaches and is stayed in the wall hole by the nut (3) of the mutual fastening of ripple, and smooth substantially, no convex epirelief, metal expansion pipe (2) and the nut (3) stayed in the wall hole can continue to use.

Claims

1, a kind of expansion of metal screw, it includes annex packing ring (4), spring washer (5), it is characterized in that, and it also includes bolt (1), metal expansion pipe (2), tapered cup nut (3), and the lower end of said bolt (1) has outside thread; The inwall of the expandable end of metal expansion pipe (2) fluting has interior ripple; The inwall of tapered cup nut (3) has screw thread, outer wall to have ripple, also has taper muscle (6) on the outer wall; Tapered cup nut (3) is connected with metal expansion pipe (2) by outer ripple, the outside thread of the inner thread of tapered cup nut (3) and bolt (1) matches, bolt (1) drives tapered cup nut (3) by outside thread, tapered cup nut (3) hangs in metal expansion pipe (2) expands metal expansion pipe (2) lower end, thereby be fixed in the exterior object, taper muscle (6) on the tapered cup nut (3) snaps in the groove of being opened on the metal expansion pipe (2) simultaneously, tapered cup nut (3) is closely linked to each other with metal expansion pipe (2), when screwing, nut (3) can not rotate simultaneously with bolt (1) at bolt (1).