CN2135678Y

CN2135678Y - Screw driving expansion bolt

Info

Publication number: CN2135678Y
Application number: CN 91229942
Authority: CN
Inventors: 赵龙江
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-11
Filing date: 1991-12-11
Publication date: 1993-06-09
Anticipated expiration: 2001-12-11

Abstract

The utility model provides an expanding bolt. The expanding bolt is that a bolt goes through a cushion and an expansion barrel to screw into the inner side of a nut to make that the expansion barrel expands tightly on a hole wall and after an ordinary expanding bolt is fastened, the extra part of the ordinary expanding bolt, which extends outwards can be avoided; the expanding bolt is screwed into integration with the bolt by a fixing nut or a movable nut; when used, the nut and the expansion barrel are put into the hole of a wall or the hole of other object and the bolt is used to go through the cushion and the hole of a fixed object; the bolt is screwed towards the nut. The utility model has the advantages of compact structure, convenience, practicability, beautiful appearance, etc.

Description

Screw driving expansion bolt

The utility model relates to a kind of upset bolt, belongs to hardware products.

At present, the EXPANSION ANCHOR BOLTS that people generally use is outwards to screw out, by external force the nut rotation is outwards screwed out bolt during use, bolt lower cone body swells expansion cylinder and is fastened in the hole of wall or other object, unnecessaryly after bolt outwards screws out go out a part of screw rod, it is unbecoming again promptly to be in the way, it is removed very difficult, sometimes or even impossible.

The purpose of this utility model is to provide a kind of EXPANSION ANCHOR BOLTS by nut precession in the hole.

The purpose of this utility model is to realize like this, nut is fixed on expansion cylinder the right (during use outside the hole half one), bolt is by the rotation precession in expansion cylinder in nut, the anterior circular cone of bolt with the outside swelling in interior inclined-plane of the expansion cylinder left side (during use in the hole end half one) trisection on hole wall, or nut is placed on the expansion cylinder left side (during use in the hole end half one), bolt is by turning to precession in the expansion cylinder in the nut inward turning, and tightening nut, nut cylindrical cone has the trisection convex tendon, in the dead slot of expansion cylinder trisection, slide, nut is not rotated but outside the hole straight line motion with the expansion cylinder swelling on hole wall, constitute inside and outside coupled EXPANSION ANCHOR BOLTS.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is a model utility structure sectional view.

Among the figure: [1] bolt, [2] pad, [3] expansion cylinder, [4] nut.

With reference to accompanying drawing 1, bolt [1] passes nut [4] that pad [2] and expansion cylinder [3] right-hand member connect together and revolves and be one, or bolt [1] to pass that pad [2] and the same nut of expansion cylinder [3] [4] revolve be that one constitutes the inside and outside screw type EXPANSION ANCHOR BOLTS that links.

The utlity model has compact conformation, the characteristics such as convenient and practical, elegant in appearance.

Claims

1, a kind of inside and outside binding screw type EXPANSION ANCHOR BOLTS that constitutes by bolt (1), pad (2), expansion cylinder (3) and nut (4) one, it is characterized in that: nut (4) fuses on expansion cylinder (3) the right, there is the interior round inclined-plane of trisection the expansion cylinder left side, the bolt front portion is a cone, first half is a cylindrical body, and latter half part is threaded circular cylinder and hexahedron.

2, a kind of inside and outside binding screw type EXPANSION ANCHOR BOLTS that constitutes by bolt (1), pad (2), expansion cylinder (3), nut (4), it is characterized in that: nut (4) circular cone body diameter has the convex tendon of trisection, there is the dead slot of trisection in the end half one of expansion cylinder, the bolt front portion is that cone, first half are the threaded circular cylinders, and latter half part is cylindrical body and hexahedron.