CN2249841Y

CN2249841Y - Expanded bolt without bared screw-rod

Info

Publication number: CN2249841Y
Application number: CN 96208995
Authority: CN
Inventors: 杨延光
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-22
Filing date: 1996-04-22
Publication date: 1997-03-19
Anticipated expiration: 2006-04-22

Abstract

The utility model relates to an expansion bolt which is a non-exposed expansion bolt. The utility model is characterized in that a shim is welded together with an expansion tube or the rear part of the expansion tube is provided with three to four lug bosses; the forepart of the expansion tube is symmetrically provided with two guide grooves and two open grooves; being cone-shaped, a nut whose upper end is fine and both sides are symmetrically provided with lug bosses is fitted to the guiding grooves of the expansion tube. After the expansion bolt is arranged for use, a screw rod is not exposed outside; the utility model has a beautiful appearance, easy disassembly, reusability and safe and convenient operation, and is an ideal expansion bolt for building finishing and family use.

Description

Do not have and expose the screw expansion bolt

This model utility relates to EXPANSION ANCHOR BOLTS, is that the nothing that a kind of construction and decoration and family use exposes the screw expansion bolt.

At present, the EXPANSION ANCHOR BOLTS of selling on the market is broadly divided into two kinds: a kind of is iron EXPANSION ANCHOR BOLTS, form by conical head screw rod, nut, pad and expansion tube, and this EXPANSION ANCHOR BOLTS, fixing back screw rod exposes, and it is not attractive in appearance to be in the way; Another kind is the plastic tube EXPANSION ANCHOR BOLTS, is made up of WOOD SCREWS and expansion tube, and this EXPANSION ANCHOR BOLTS loading angle is bad, effort when tightening, and with the passing of time easily loosening, above-mentioned two kinds of EXPANSION ANCHOR BOLTS all are disposable uses, load onto just to be difficult for unloading, and unload also and can use again.

The purpose of this model utility provides a kind of nothing and exposes EXPANSION ANCHOR BOLTS, to solve existing EXPANSION ANCHOR BOLTS all is disposable use, load onto and just be difficult for unloading, unload and to use again, and iron EXPANSION ANCHOR BOLTS screw rod exposes length, and it is not attractive in appearance to be in the way, and plastic tube EXPANSION ANCHOR BOLTS loading angle is bad, effort when tightening, with the passing of time easily loosening problem.

The purpose of this model utility is achieved in that this EXPANSION ANCHOR BOLTS is made up of screw rod, nut, pad and expansion tube, the expansion tube rear portion is provided with 3--4 inner convex platform, the front portion is symmetrically arranged with two guiding grooves, two opening slots, nut is truncated cone, upper end diameter is thin, there is symmetrical boss both sides, and itself and guide groove of the expansion sleeve match.

This EXPANSION ANCHOR BOLTS is by screw rod, nut, and the expansion tube of pad is formed, and expansion tube and the concentric solid welding of pad are together, the expansion tube front portion is symmetrically arranged with two guiding grooves, two opening slots, and nut is truncated cone, upper end diameter is thin, and there is symmetrical boss both sides, and itself and guide groove of the expansion sleeve match.

The guide groove of the expansion sleeve end is provided with the hook platform.

Screw rod is hexagon head, cup head or countersunk head screw rod.

This model utility compared with prior art has the following advantages: 1) install and use the back screw rod do not expose, attractive in appearance; 2) quick detachable, reusable; 3) easy to use, safe and reliable.

Be described further below in conjunction with accompanying drawing:

Fig. 1 does not have the screw expansion of exposing bolt arrangement schematic representation;

Fig. 2 expansion tube parts drawing;

Fig. 3 nut part figure;

Fig. 4 nut left view.

Fig. 1--in 4: screw rod (1) adopts the common standard screw rod, nut (2) is taper type, upper end diameter is thin, lower end diameter is thick, the upper end portion bilateral symmetry is provided with boss (9), its internal thread and screw rod (1) match, expansion tube (3) front portion is symmetrically arranged with two guiding grooves (6), article two, opening slot (8), guiding groove (6) matches with nut (2) boss (9), guiding groove (6) end is provided with hook platform (7), in case nut drops, be evenly equipped with 3--4 inner convex platform (5) or together on the cross section in expansion tube (3) rear end, to guarantee the concentricity of screw rod and expansion tube with pad (4) and expansion tube (3) solid welding.

Claims

1, a kind of nothing exposes the screw expansion bolt, form by screw rod (1), nut (2), expansion tube (3), pad (4), it is characterized in that: expansion tube (3) rear portion is provided with 3-4 inner convex platform (5), the front portion is symmetrically arranged with two guiding grooves (6), two opening slots (8), nut (2) is truncated cone, upper end diameter is thin, and both sides are provided with symmetrical boss (9), and the guiding groove (6) of itself and expansion tube (3) matches.

2, a kind of nothing exposes the screw expansion bolt, form by screw rod (1), nut (2), expansion tube (3), pad (4), it is characterized in that: expansion tube (3) and the concentric solid welding of pad (4) are together, the expansion tube front portion is symmetrically arranged with two guiding grooves (6), two opening slots (8), nut (2) and is truncated cone, upper end diameter is thin, both sides are provided with symmetrical boss (9), and the guiding groove (6) of itself and expansion tube (3) matches.

3, EXPANSION ANCHOR BOLTS according to claim 1 and 2 is characterized in that: guiding groove (6) end of expansion tube (3) is provided with hook platform (7).

4, EXPANSION ANCHOR BOLTS according to claim 1 and 2 is characterized in that: screw rod (1) is hexagon head, cup head or countersunk head screw rod.