CN2883759Y

CN2883759Y - Expansion screw bolt

Info

Publication number: CN2883759Y
Application number: CN 200620080678
Authority: CN
Inventors: 谢士超
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-20
Filing date: 2006-01-20
Publication date: 2007-03-28
Anticipated expiration: 2016-01-20

Abstract

The utility model relates to a high intensity expansion screw, which is characterized in comprising a screw rod 3 with an expanding sleeve 2 in the end of the screw rod and a tapered 1 matched with the expanding sleeve. Adopted the technical proposal in the utility model, the diameter of the drilling hole in the wall is smaller and enough to implant the expansion screw and the depth of the drilling hole and the length of the implanting expansion screw are equivalent so that when striking down the expansion screw with a hammer, the whole expansion bolt can be expanded and be fastened by means that the expanding sleeve is expanded by the expanding body. Therefore, the utility model is convenient to use and at the same intensity condition, the volume of the expansion bolt is decreased and the cost is reduced.

Description

Expansive screw

Technical field:

The utility model relates to hardware-joint, particularly is used for the high strength expansive screw (bolt) that industrial and mining enterprise's equipment is installed and civilian installation is installed.

Background technique:

Be extensive use of expansible anchor of metal on the engineering construction various device has been installed, it is made up of a bolt and an expansion set that has the bloated body of awl, but find that in long-term use common EXPANSION ANCHOR BOLTS exists following defective: need to bore big slightly hole in advance EXPANSION ANCHOR BOLTS is inserted, twisting the nut that matches with bolt again expands expansion set, EXPANSION ANCHOR BOLTS is fixed the most at last, therefore it uses cumbersome, when the hole of being bored is big slightly, expansion set easily moves up with bolt, cause the expansion degree of depth not enough, withdrawal resistance declines to a great extent.Extensively retrieve at the problems referred to above, do not find new solution preferably as yet.

Summary of the invention:

The purpose of this utility model is exactly for solving the high-strength expansive screw of a kind of brand new that the above-mentioned defective that exists in the prior art designs.

To achieve these goals, the utility model has adopted following technological scheme:

A kind of expansive screw is characterized in that it has the screw rod of expansion set by one one end and the bloated body that has tapering that one is matched with expansion set is formed.Described bloated body can be cone, also can be wedge pin.

The utility model is owing to adopt technique scheme, the diameter of the porthole that bores is less, can allow expansive screw insert and get final product, and the degree of depth in the hole of being bored is suitable with the expansive screw that will insert, knock expansive screw with hammer, can pass through to expand body, thereby the whole swelling of EXPANSION ANCHOR BOLTS is fixed, therefore the expansion set distending, the utility model is very easy to use, under the equality strength condition, the EXPANSION ANCHOR BOLTS volume reduces to some extent, and cost decreases.

For the utility model is described in further detail, following accompanying drawing provides two most preferred embodiments of the present utility model.

Description of drawings:

Fig. 1 is the utility model embodiment one a plan view;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the utility model embodiment two a plan view;

Fig. 4 is the B-B sectional view of Fig. 3;

Fig. 5 is the distressed structure of the bloated body among Fig. 3;

Fig. 6 is the C-C sectional view of Fig. 5.

Embodiment:

Embodiment one as shown in Figure 1 and Figure 2, bolt 3 left sides are provided with two V-arrangement expansion sets 2, the inclined-plane of wedge pin 1 cooperates with V-arrangement expansion set 2, knocks bolt 3 and expansion set 2 distendings can be made that expansive screw is whole to be fixed with porthole.

Embodiment two as shown in Figure 3, Figure 4, bolt 3a left side is provided with expansion set 2a, the inner chamber 4 of expansion set 2a is cylindrical or taper, expansion set 2a is provided with 4 slits 5, expansion set 2a is divided into 4, the bloated body 1a of taper is set among the expansion set 2a, knocks bolt 3a and expansion set 2a distending can be made expansive screw integral body fix with porthole.The body 1a that expands also can be a structure shown in Figure 5, its conical section be provided with that 4 slits 5 with expansion set 2a adapt stupefied 6, stupefied 6 can be along the slit 5 with the expansion set distending.

Claims

1, a kind of expansive screw is characterized in that it has the screw rod of expansion set by one one end and the bloated body that has tapering that one is matched with expansion set is formed.

2, expansive screw according to claim 1 is characterized in that described bloated body is a cone.

3, expansive screw according to claim 1 is characterized in that described bloated body is a wedge pin.