CN2146598Y

CN2146598Y - Quick-mounting and dismounting expansion screw

Info

Publication number: CN2146598Y
Application number: CN 93205402
Authority: CN
Inventors: 张洪占
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-11
Filing date: 1993-03-11
Publication date: 1993-11-17
Anticipated expiration: 2003-03-11

Abstract

The utility model relates to a quick-mounting and dismounting expansion screw, comprising an expansion sleeve, a conical screw nut and a screw which is connected with the screw threads of the conical screw nut. The utility model is characterized in that the expansion sleeve is formed by the assembly of three arc shaped plates with a same shape; the middle and the end of the expansion sleeve are respectively provided with a circular groove; an elastic pipe hoop is sheathed in the circular groove; three stop holes are uniformly distributed on the pipe wall of the expansion sleeve; three stop hooks are uniformly distributed on the port of the conical screw nut; the stop hooks are clamped in the stop holes. The utility model has the advantages that the quick-mounting and dismounting expansion screw can be quickly mounted and dismounted and the quick-mounting and dismounting expansion screw can be used repeatedly for a plurality of times.

Description

Quick-mounting and dismounting expansion screw

The utility model relates to a kind of fast assembling-disassembling swell fixture of installing with building.

EXPANSION ANCHOR BOLTS commonly used, it is long in use mostly to exist the bolt end to expose, be difficult for the shortcoming of dismounting, Chinese patent CN2082787U discloses a kind of swell fixture, and this swell fixture comprises expansion sleeve, conical nut and screw, this patent has overcome above-mentioned shortcoming preferably, but because its expansion sleeve is that expansion sleeve will produce plastic deformation behind the body of wall that expands at uniform three grooves of expansion arc, increased difficulty to dismounting, and dismantled later expansion sleeve and can not reuse.

The purpose of this utility model is to provide a kind of fast assembling-disassembling swell fixture, and this swell fixture can overcome above-mentioned deficiency.

The purpose of this utility model is achieved in that the fast assembling-disassembling swell fixture, expansion sleeve is arranged, conical nut and the screw that is threaded with it, expansion sleeve is made of three identical arc plate assembly units of shape, expansion sleeve middle part and end are provided with circular groove, are set with the elasticity pipe collar in this groove, uniform three stop hole on the expansion sleeve tube wall, uniform three strip dogs of conical nut port part, this strip dog buckles in the stop hole.When using the utility model that object is installed, on body of wall, bore a deep hole earlier, the utility model and the object of being fixed are connected in advance, then the utility model is sent in the deep hole, tightening screw gets final product, in process with screw-driving, conical nut is pulled outwardly moving, its conical surface outside makes expansion sleeve outwards open gradually, final tensioner is in body of wall, because expansion sleeve is made of three arc plates, when opening Shi Buhui, it produces plastic deformation, when need are removed it, only need screw is unscrewed, expansion sleeve just can restore to the original state under the effect of elasticity pipe collar, can very successfully withdraw from from the hole of body of wall, and the utility model that withdraws from can reuse.Because conical nut and expansion tube rely on strip dog and stop hole to link together, drive nut in the time of can preventing to turn screw and rotate in the same way and influence fitting operation, raising dismounting speed.

Therefore, the utility model compared with the prior art, having can fast assembling-disassembling, the advantage that is repeatedly used.

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

Fig. 1, the utility model structural representation

Fig. 2, expansion sleeve schematic representation

Fig. 3, conical nut schematic representation

The A-A section of Fig. 4, Fig. 2

Referring to accompanying drawing, the screw 5 that the utility model has an expansion sleeve 2, conical nut 1 and is threaded with it, expansion sleeve is to process a circular groove 4 by three identical arc plate assembled (referring to Fig. 2 and Fig. 4) expansion sleeve middle part and right parts of shape, the elasticity pipe collar 3 of a spring thread coiling of suit in circular groove, uniform three stop hole 6 on the expansion sleeve tube wall, this stop hole can be opened at two arc plate seam crossings by mode shown in Figure 2, also can open the position at the every arc plate axis of symmetry.The conical nut left end has a cylindrical portion, is processed with profile of tooth annular knurl 7 on it, and uniform three strip dogs 8 on its right output port, this strip dog buckle in the stop hole on the expansion sleeve can prevent that conical nut is with the equidirectional rotation of screw.

Claims

1, a kind of fast assembling-disassembling swell fixture, expansion sleeve is arranged, conical nut and the screw that is threaded with it, it is characterized in that described expansion sleeve is made of three identical arc plate assembly units of shape, expansion sleeve middle part and end are provided with circular groove, be set with the elasticity pipe collar in this groove, uniform three stop hole on the expansion sleeve tube wall, uniform three strip dogs of described conical nut port part, this strip dog buckles in the stop hole.