CN2307954Y - Expansion bolt - Google Patents

Abstract

The utility model discloses an expansion bolt used for acting on the wall. The utility model firstly makes a bolt (1) penetrate into an expansion pipe (3) from the non-slotting end of the expansion pipe (3) on the basis of not changing the expansion pipe of an original expansion bolt, and then a cone nut (2) is screwed on the bolt (1) on the slotting end of the expansion pipe (3). When in use, the expansion bolt is inserted into a wall hole, and the cone nut can be driven to outwards move along the axial direction of the bolt (1) to strut the expansion pipe (3) to be tightly strutted with the wall hole by screwing the bolt (1), obtaining the purpose of fastening. The structure makes the length of the expansion bolt selected through simple account and can fundamentally solve the problem that the original expansion bolt exposes an excess screw rod too long after firmly fixed.

Description

A kind of EXPANSION ANCHOR BOLTS

The utility model has related to a kind of through improved EXPANSION ANCHOR BOLTS, particularly a kind of EXPANSION ANCHOR BOLTS that acts on the wall.

Before the utility model was made, the working principle of existing EXPANSION ANCHOR BOLTS was on the market: EXPANSION ANCHOR BOLTS is inserted in the porthole, turned nut and outwards spur bolt and make bolt tapered distal end dilating expansion pipe and porthole stretching, thereby reach fastening purpose.Because various wall quality differ, how long just bolt is drawn out can make expansion tube and porthole stretching, can't calculate.Even know the size of fastened object fixed hole (length), before use, still can not make accurate selection to the size of EXPANSION ANCHOR BOLTS, too short can not the use, it is long that then can to expose unnecessary screw rod behind fastening finishing oversize, be most unseemly, but will clip unnecessary screw rod again, can cause very big difficulty to installation personnel.Therefore, brought worry to the user.

It is a kind of through improved EXPANSION ANCHOR BOLTS that the purpose of this utility model will provide exactly.It not only can be according to actual needs make accurate selection through simple calculating, and can fundamentally solve on the market existing EXPANSION ANCHOR BOLTS expose the oversize problem of unnecessary screw rod behind fastening finishing.

The purpose of this utility model is achieved in that on former EXPANSION ANCHOR BOLTS expansion tube basis of invariable, bolt, nut is improved.Process a tapered internal diameter of external diameter and process threaded tapered cup nut (female) hereinafter to be referred as awl.And what replace former bolt is common hex head bolt (other as cutter head, hexagon socket head cap screw etc. all can) (hereinafter to be referred as bolt), earlier bolt is penetrated the expansion tube from expansion tube unslotted end, then will bore female the end at the expansion tube fluting again and be screwed on the bolt.During use, EXPANSION ANCHOR BOLTS is inserted in the porthole,, made the awl mother strut expansion tube and porthole stretching to outwards moving just can be pulled outwardly the mantle mother, thereby reach fastening purpose along bolt axis as long as turn bolt.

Because the working principle of former EXPANSION ANCHOR BOLTS is to turn nut outwards to spur bolt dilating expansion pipe.So the length of bolt can't be made accurate selection.The utility model then is to have adopted to turn the working method that bolt is pulled outwardly the female dilating expansion pipe of mantle, list is said straight line motion, bolt can be regarded " transfixion " as, because be " transfixion " the length of EXPANSION ANCHOR BOLTS expansion tube just can make accurate selection, that is: the length of the length of the length of EXPANSION ANCHOR BOLTS=fastened thing fixed hole+EXPANSION ANCHOR BOLTS expansion tube through simple calculating.Turn the working method that bolt is pulled outwardly the mantle mother because adopted, can fundamentally be resolved so former EXPANSION ANCHOR BOLTS is exposed the oversize problem of unnecessary screw rod behind fastening finishing.Also,, can select according to actual needs equally for the selection (adopting hex head bolt in this way still is hexagon socket head cap screw etc.) of bolt just because of having adopted structure described in the utility model.The utility model principle is simple, and is easy to install and use.When the enforcement structure that will describe in detail below adopting.Number of parts and cost almost do not increase.

The concrete structure of model utility is provided by following examples and accompanying drawing.

Fig. 1 is the vertical sectional view of concrete structure of the present utility model.

Fig. 2 is a fundamental diagram of the present utility model.

Describe concrete structure of the present utility model and working principle in detail below in conjunction with accompanying drawing.As shown in Figure 1: this device comprises by bolt (1), awl female (2) and expansion tube (3) formation.It is characterized in that earlier the unslotted end of bolt (1) from expansion tube (3) being penetrated the expansion tube (3), then will bore female (2) again and be screwed on the bolt (1) at the fluting end of expansion tube (3).

During use, as shown in Figure 2: bolt is inserted in the porthole, strut expansion tube (3) and porthole stretching just can drive awl female (2) along bolt (1) is axially outwards mobile as long as turn bolt (1), thereby reach firm purpose.

Claims (1)

1. Do a kind of EXPANSION ANCHOR BOLTS that is used on the wall, constitute by bolt (1), the female ⑵ of awl and expansion tube (3), it is characterized in that: earlier the unslotted end of bolt (1) from expansion tube (3) penetrated the expansion tube (3), then will bore female (2) again and be screwed on the bolt (1) at the fluting end of expansion tube (3).

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