CN2149506Y - Expansion bolt - Google Patents

Abstract

Disclosed is a new expansion bolt, which is particularly suitable for fixing objects on walls, ground surfaces and ceiling plates, comprising an expansion screw nut and a bolt, wherein, the expansion screw nut comprises an expansion bolt (1) outer tube (2) one end of which is tapered and other end of which is cylinder shaped; when used, the expansion screw nut is fixed in a wall and the bolt is fixed with the fixed object screwed in the expansion screw nut. The new expansion bolt provided by the utility model can be used to fix a thinner object by a same expansion bolt as well as a thicker object. After the object is fixed, a screw cap whose thickness is only a plurality of millimetres is exposed out of the object; particularly, when the object does not need fixing, only a small hole is arranged on the wall and people, objects and adhesive wall papers can not be scratched; when houses are painted, marks can not exist with beautiful appearance and safety.

Description

Expansion bolt

A kind of novel expansion bolt is specially adapted to fixed object on wall, ground or plate.

Expansion bolt commonly used is made up of the screw and the plain nut of belt rising tube, during use, with the part of screw be fixed on wall, or ceiling board in, fastening nut from the outside, thereby fixed object.When not needing fastening object, the part of screw still protrude wall, or plate outside, bump easily and hang people, thing, both dangerous, also not attractive in appearance.Expansion bolt commonly used since be with screw within the walls, so the fixation body thickness can not surpass screw length, need select new bolt for use when thicker object is retightened in same place, original screw can not be used again.

For overcoming the deficiency of existing expansion bolt, make the protruding part minimizing as far as possible outside wall of expansion bolt, when this bolt does not use, outside wall, plate, there is not bump, have only an aperture, avoid bumping extension people, thing; Again leave no trace during sticking wallpaper, both safety was attractive in appearance again.And the purpose of this utility model also is to be fixed on the object that within the walls the same mother of rising can fastening all thickness.And in use instrument there is not specific (special) requirements, easy to use.

The utility model by be fixed on wall, or plate in swollen nut and the screw of rising form.Screw is identical with existing screw, and the length of screw is decided as required, and is general more longer than screw commonly used, can select the screw that mates with the swollen nut that rises arbitrarily for use according to the thickness of fastened object.The diameter of screw adapts with the mother's (1) of rising internal diameter.The swollen nut that rises is to be made of mother of rising (1) and outer tube (2).Female outer surface one end that rises is a centrum, and the other end is a cylindrical body, thereby forms round platform (4) at female outer surface cylindrical body one end that rises, and the matrix face that rises has fin or burr, in the mother of rising screw thread is arranged.Outer tube structure is identical with expansion bolt outer tube structure commonly used, and an end has seam (3), and outer tube (3) one ends with seam are enclosed within female centrum one end outside of rising, and the internal diameter of outer tube adapts with female external diameter that rises.

The novel expansion bolt that the utility model provides can make the same swollen nut that rises that is fixed in wall, ground, the plate can fix than thin objects, also can fix thicker object.And instrument selected during fastening object is more extensive, and the sleeve that is unsuitable for fastening expansion bolt commonly used is removed son and also can be used.After object is fastening, be exposed at the screw cap that fastened object has only several millimeters thick outward, better appearance, particularly when not needing fixed object, wall, or plate on have only an aperture, can not bump and hang people, thing, sticking wallpaper etc. leaves no trace again, and is both attractive in appearance, again safety.

As accompanying drawing:

Fig. 1 is the swollen nut schematic representation that rises

Fig. 2 is female schematic representation that rises

Fig. 3 is the outer tube schematic representation

The 1--female 2--outer tube 3--seam 4--round platform 5--fin that rises

Embodiment one:

A kind of novel expansion bolt, by be fixed on wall, or plate in swollen nut and the screw of rising form.Screw is identical with screw commonly used, and is general more longer than screw commonly used, can select the screw that mates with the swollen nut that rises arbitrarily for use according to the thickness of fixation.The fixing object of different-thickness in same place, original swollen nut that rises still can use, and a screw that only needs to change different length gets final product.The swollen nut that rises is made up of with outer tube (2) the mother of rising (1).Female outer surface one end that rises is a centrum, and the other end is the wide cylindrical body of 4-5mm, forms round platform (4), and it is not crooked that the mother of rising is entered behind the outer tube; The mother (1) of rising is outer to have two fins (5) to rise has the internal thread that is about 5mm in the mother, goes into to buckle easily when screw is screwed into.Outer tube (2) is identical with expansion bolt outer tube structure commonly used, at one end have four seams (3), mother (1) centrum one end that rises is enclosed within outer tube (2) when cracking in the end, and the fin of female outer surface that rises is stuck in two seams (3), so that the mother of rising does not rotate in outer tube.During use, put spring pad and packing ring with screw and be screwed into female internal thread that rises, insert then in the hole of accomplishing fluently on the wall, thereby make object fixing on the wall from the outer tube end that do not crack.

Embodiment two:

A kind of novel expansion bolt is formed by being fixed on rise nut and screw of within the walls swollen.Screw is identical with bolt structure commonly used, selects the screw of different length for use according to the thickness of fixation, and the diameter of screw should be complementary with the swollen nut that rises.The swollen nut that rises is by the mother of rising (1), and outer tube (2) is formed.Female outer surface one end that rises is a centrum, and the other end is a cylindrical body, thereby forms round platform (4), so that the mother of rising enters behind the outer tube is not crooked, female outer surface that rises has vertical burr, to add the frictional force female and outer tube that rises sharply, prevents to rise and femalely rotates in outer tube.Rising has the internal thread that is about 5mm in the mother, goes into to buckle easily when screw is screwed into.Outer tube (2) is identical with expansion bolt outer tube structure commonly used, at one end has four seams (3).During use, put spring pad and packing ring with screw and be screwed into female internal thread that rises, insert then in the hole of accomplishing fluently on the wall, thereby object is fixed from the outer tube end that do not crack.

Claims (3)

1, a kind of novel expansion bolt is characterized in that it forms by being fixed on rise nut and screw of swollen in wall, ground or the plate, and the wherein swollen nut that rises is taper by an end, and the other end is that the columniform mother of rising (1), outer tube (2) are formed;

2, expansion bolt according to claim 1, mother (1) appearance that it is characterized in that rising have protruding or fin (5);

3, expansion bolt according to claim 2, mother (1) cone one end that it is characterized in that rising are enclosed within outer tube (2) and crack in the end.

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