CN2431431Y

CN2431431Y - Adjustable expansion bolt

Info

Publication number: CN2431431Y
Application number: CN 00250913
Authority: CN
Inventors: 高一鹏
Original assignee: Gao Erman
Current assignee: Gao Erman
Priority date: 2000-08-25
Filing date: 2000-08-25
Publication date: 2001-05-23
Anticipated expiration: 2010-08-25

Abstract

The utility model relates to an adjustable expansion bolt, which is a fastening device for fixing objects on a wall body of concrete or brick mixture. The adjustable expansion bolt comprises a screw rod, wherein, the tail part of which is a cone. An expansion screw is arranged on the screw rod. The tail end of the expansion screw is provided with a cross slot. The top end is processed with internal screw threads. A hexagonal screw bolt, a washer, and a spring washer are arranged on the internal screw threads of the expansion screw in sequence. The middle of the hexagonal screw bolt is provided with a through hole. The hexagonal screw bolt, the washer, and the spring washer are also sheathed on the screw rod simultaneously. A nut is connected to the screw rod by screw threads. The adjustable expansion bolt is used for the looseness occurrence of exceeding the expansion limit of an expansion member after fastening, the looseness caused by an exogenic action while in use, and lock for situations that a drilled bottom hole is too deep or the diameter of the drilled hole is too large. Thus, a second fastening of a fastener is solved.

Description

Adjustable EXPANSION ANCHOR BOLTS

The utility model is a kind of adjustable EXPANSION ANCHOR BOLTS, and it is a kind of securing means that is used for fixing object on concrete or brick masonry wall.

At present, being used for fixing object on concrete or brick masonry wall, mostly is EXPANSION ANCHOR BOLTS to be fixed in concrete or the brick masonry wall fix.EXPANSION ANCHOR BOLTS has two kinds, and a kind of is that afterbody is to have swell fixture on the screw rod of cone, and another kind is to have the EXPANSION ANCHOR BOLTS of hitting the core steel nail.These two kinds of EXPANSION ANCHOR BOLTS install and using process in occur looseningly, have plenty of becoming flexible of the expansion lit range that exceeds expansion piece in fastening back, or becoming flexible of causing under the effect of external force in use, continue fasteningly can not lock again.

The purpose of this utility model provides a kind of adjustable EXPANSION ANCHOR BOLTS, solve that EXPANSION ANCHOR BOLTS exceeds expansion lit range loosening of expansion piece in fastening back and cause under external force when using loosening, thereby the fastening problem of secondary of solution fastening piece.

The purpose of this utility model is achieved in that

A kind of adjustable EXPANSION ANCHOR BOLTS, comprise that afterbody is the screw rod of cone, have swell fixture on the screw rod, it is characterized in that the tail end of swell fixture has cross recess, the top is processed with internal thread, hex head bolt and packing ring and spring washer are installed on the internal thread of swell fixture according to this, have through hole in the middle of the hex head bolt, the while hex head bolt, packing ring and spring washer are enclosed within on the screw rod, nut is by being threaded on the screw rod, and nut is near hex head bolt.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is that band hits the structural representation of core EXPANSION ANCHOR BOLTS.

Wherein 1, swell fixture 2, screw rod 3, hex head bolt 4, packing ring 5, spring washer 6, nut 7, hit the core steel nail.

In conjunction with the accompanying drawings structure of the present utility model is illustrated:

A kind of adjustable EXPANSION ANCHOR BOLTS, comprise that afterbody is the screw rod 2 of cone, be with swell fixture 1 on the screw rod 2, the tail end of swell fixture 1 has cross recess, the top is processed with internal thread, hex head bolt 3 is installed on the internal thread of swell fixture according to this, and packing ring 4 and spring washer 5 have through hole in the middle of the hex head bolt 3, while hex head bolt 3, packing ring 4 and spring washer 4 are enclosed within on the screw rod 2, and nut 6 is by being threaded on the screw rod 2, and nut 6 is near hex head bolt 3.

EXPANSION ANCHOR BOLTS is in installation and using process, the becoming flexible of expansion lit range that exceeds expansion piece in fastening back, or during the loosening situation that causes under the effect of external force in use, distance between can regulate hex head bolt 3 and the swell fixture 1 is to correct position, swivel nut 6 then, strain at cross recess that screw rod 2 makes the swell fixture tail end continue to around expand, it is fastening to carry out secondary.Cross dark or bore diameter situation bigger than normal for boring bottom outlet, use adjustable EXPANSION ANCHOR BOLTS, can solve fastening not firm problem.

In the structure of hitting core steel nail EXPANSION ANCHOR BOLTS, it is that EXPANSION ANCHOR BOLTS is divided into two sections, and an end is a swell fixture, and the other end is a hex head bolt, is connected with screw pair between them.Be swell fixture 1 afterbody cross recess arranged equally, its top is processed with internal thread, swell fixture internal thread and hex head bolt 3 are by being threaded, and and packing ring 4 and spring washer 5 screw thread one.Hitting core steel nail 7 is inserted in the swell fixture 1.The becoming flexible of expansion lit range that exceeds expansion piece in fastening back, or during the loosening situation that causes under the effect of external force in use, the distance of regulating between hex head bolt 3 and the swell fixture 1 arrives correct position, impact core steel nail 7 then, make the cross recess of swell fixture 1 tail end continue to around expand, locked that to carry out secondary fastening.

The adjustable EXPANSION ANCHOR BOLTS that provides of the utility model thus can solve the loosening problem that EXPANSION ANCHOR BOLTS exceeds expansion lit range loosening of expansion piece in fastening back and cause under external force when using, thus the fastening problem of secondary of solution fastening piece.

Claims

1, a kind of adjustable EXPANSION ANCHOR BOLTS comprises that afterbody is the screw rod of cone, has swell fixture on the screw rod, the tail end that it is characterized in that swell fixture has cross recess, the other end is processed with internal thread, and hex head bolt and packing ring and spring washer are installed on the internal thread of swell fixture according to this, has through hole in the middle of the hex head bolt, the while hex head bolt, packing ring and spring washer are enclosed within on the screw rod, and nut is by being threaded on the screw rod, and nut is near hex head bolt.