CN2835681Y

CN2835681Y - Expansion threaded sleeve

Info

Publication number: CN2835681Y
Application number: CN 200520079604
Authority: CN
Inventors: 陆赤音
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2005-10-31
Filing date: 2005-10-31
Publication date: 2006-11-08
Anticipated expiration: 2015-10-31

Abstract

An expansion threaded casing, including a casing and a connecting rod that can be fixedly connected with the casing, the front part of the casing is provided with a threaded hole matching the connecting rod, and the middle part of the casing is provided with a pin hole for installing a pin. The tail of the pipe is evenly provided with more than two expansion ports. The utility model has a threaded hole matched with the connecting rod on the front part of the casing. When it is discarded, it only needs to remove the connecting rod, which is easy to operate and does not affect the beauty of the wall. When it needs to be replaced, only the external connecting rod needs to be replaced. , instead of replacing the expansion threaded casing as a whole, which is convenient to use and reduces unnecessary waste.

Description

A kind of expansion screw sleeve pipe

Technical field

The utility model relates to a kind of wall expansion class fixed connection hardware, particularly a kind of expansion screw sleeve pipe.

Background technique

Mostly general wall is EXPANSION ANCHOR BOLTS with expansion class fixed connection hardware at present.In case after this bolt moulding, working method is single can not to be changed, the corresponding different types of EXPANSION ANCHOR BOLTS of the different modes of action, if will change its mode of action, must buy the EXPANSION ANCHOR BOLTS of corresponding kind, install again, so just strengthen user cost.When passing into disuse, EXPANSION ANCHOR BOLTS is difficult for removing in body of wall, and it is attractive in appearance to influence wall, brings inconvenience and unnecessary waste.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, provides a kind of simple in structure, is applicable to the expansion screw sleeve pipe of different outer type modes.

For achieving the above object, the technical solution adopted in the utility model is: comprise sleeve pipe and the connecting rod that can fixedly connected with sleeve pipe, be characterized in, the front portion of sleeve pipe offers the tapped hole that matches with connecting rod, the middle part of sleeve pipe offers the pin hole that pin is installed, and the afterbody of sleeve pipe evenly offers the expansion hatch more than two.

Another characteristics of the present utility model are: sleeve pipe is a step-like structure, and the afterbody of pin hole is cylindrical, and it is conical that point is, and the aperture of pin hole is less than the path of tapped hole; Also be provided with in the sleeve pipe step-like cylindrical structure match with tapped hole have an externally threaded adjusting push rod; Also offer the cross groove more than two on the cylndrical surface of the sleeve pipe 2 at expansion hatch place; The front end of sleeve pipe inside connecting rod also is provided with spring.

The utility model offers the tapped hole that matches with connecting rod in the front portion of sleeve pipe, when passing into disuse, only need remove the connection rod member, easy to operate, do not influence the attractive in appearance of wall, when needs are changed, only need change outside connecting rod, and not need integral replacing expansion screw sleeve pipe, just can change outer type, both convenient the use can be reduced unnecessary waste again.

Description of drawings

Fig. 1 is a plan view of the present utility model;

Fig. 2 is the plan view of the utility model sleeve pipe 2;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the plan view of the utility model tip cylindrical pins 4;

Fig. 5 regulates the plan view of push rod 7 for the utility model.

Embodiment

Below in conjunction with accompanying drawing structural principle of the present utility model and working principle are described in further detail.

Referring to Fig. 1～5, the utility model comprises the sleeve pipe 2 of step-like structure, offer the tapped hole 6 that matches with connecting rod 10 in the front portion of sleeve pipe 2, the middle part of sleeve pipe 2 offers the pin hole 5 that pin 4 is installed, the afterbody of pin hole 5 is cylindrical, when tip cylindrical pins 4 is tufted into pin hole 5, cylindrical uropore is to 4 helical pitches of tip cylindrical pins and fixation, it is conical that pin hole 5 points are, reduce pin 4 and enter the resistance that expansion hatch 1 is opened expansion hatch outward, the aperture of pin hole 5 is less than the path of tapped hole 6, prevent to destroy when pin 4 from hammering into the internal thread of tapped hole 6, evenly offer expansion hatch 1 more than two at the afterbody of sleeve pipe 2, also offer the cross groove 3 more than two on the cylndrical surface of the sleeve pipe 2 at expansion hatch 1 place, the effect of groove 3 is to increase the frictional force that the expansion screw sleeve pipe is made time spent expansion hatch 1 place's sleeve pipe, improve bond strength, also be provided with in the sleeve pipe 2 step-like cylindrical structure match with tapped hole 6 have an externally threaded adjusting push rod 7, regulating the groove 8 that also offers " one " font or "+" font on the push rod 7, thereby the convenient mounting or dismounting of regulating push rod 7, the effect of regulating push rod 7 is to prevent that tip cylindrical pins 4 from getting loose, increase the reliability of grappling, the front end of sleeve pipe 2 inside connecting rods 10 also is provided with spring 9, and spring 9 owing to be compressed produces pretightening force gets loose connection more fastening being difficult for of connecting rod 10 and tapped hole 6.

When using, at first the sleeve pipe 2 of expansion screw sleeve pipe is filled in the circular hole of accomplishing fluently on wall in advance, then tip cylindrical pins 4 being hammered into pin hole 5 outwards opens expansion hatch 1, to regulate push rod 7 tapped hole 6 of packing into again, at last spring 9 is packed into tapped hole 6 and connecting rod 10 is installed, the expansion screw sleeve pipe just can come into operation like this.When if the expansion screw pipe is passed into disuse, only needing connecting rod 10 and spring 9 do not pulled down to influence the attractive in appearance of wall, and easy and simple to handle.If will change the outer type mode of action of expansion screw sleeve pipe, only need to change corresponding connecting rod 10 and get final product, without integral replacing, both be easy to use like this, reduced unnecessary waste again.

Claims

1. An expansion threaded casing, including a casing [2] and a connecting rod [10] that can be fixedly connected with the casing 2, characterized in that: the front part of the casing [2] is provided with a connecting rod [10] Matching threaded holes [6], the middle part of the casing [2] is provided with a pin hole [5] for installing a pin [4], and the tail of the casing [2] is evenly provided with more than two expansion ports [1].

2. The expansion threaded sleeve according to claim 1, characterized in that: said sleeve [2] has a stepped structure, and the tail of the pin hole [5] is cylindrical, the tip is conical, and the pin The aperture of hole [5] is less than the minor diameter of threaded hole [6].

3. The expansion threaded sleeve according to claim 1, characterized in that: said sleeve [2] is also provided with a step-shaped cylindrical structure with an external thread matched with the threaded hole [6]. Adjust the ejector pin [7].

4. The expansion threaded casing according to claim 1, characterized in that: there are more than two transverse grooves [3] on the cylindrical surface of the casing [2] at the expansion port [1] .

5. The expansion threaded sleeve according to claim 1, characterized in that: a spring [9] is provided at the front end of the connecting rod [10] in the sleeve [2].