CN2434468Y

CN2434468Y - Core striking expansion bolt sleeve

Info

Publication number: CN2434468Y
Application number: CN 00218671
Authority: CN
Inventors: 葛顺宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-03
Filing date: 2000-08-03
Publication date: 2001-06-13
Anticipated expiration: 2010-08-03

Abstract

The utility model relates to a core striking expansion bolt sleeve, which comprises a hollow sleeve pipe with certain strength, a pipe wall at the lower end of the sleeve pipe is uniformly distributed with 3-4 expansion slots, the upper end of the sleeve pipe is provided with an inner thread screw, and the lower end of the sleeve pipe is provided with a taper hole, wherein, the inner diameter of which is reduced gradually. A stick core is arranged in the sleeve pipe, the upper end of the strike core is provided with a column body, and the lower end of the strike core is provided with a cone. The inner thread screw is arranged at the thicker point of the sleeve pipe, or the inner thread screw is arranged at 3-4 inward projections which are arranged at the upper end of the sleeve pipe. The utility model has the advantage of convenient use, and the utility model can prevent the strike core from rotating in a prepared hole. When the utility model is used, fixing screws with various lengths and forms can be selected according to requirements; when the utility model is not used, the fixing screw is removed without exposed part, and the beautiful appearance of the original structure is not influenced.

Description

Core-striking type expansion swivel nut

The utility model relates to a kind of fastening piece, refers to a kind of setscrew especially.

Setscrew is widely used at present as a kind of fastening piece.Existing setscrew is made up of expansion sleeve, taper bolt and nut.But its means of fixation is single, rotates easily, still has shortcomings such as bolt exposes apparent in view after the dismounting.

The purpose of this utility model is to propose a kind of core-striking type expansion swivel nut, this its special core-striking type structure and rotation prevention structure of core-striking type expansion swivel nut mat, can overcome the shortcoming of existing setscrew, make its fixation after squeezing into building, can not rotate, no exposed parts, screw can be selected different length and style as required.

A kind of core-striking type expansion swivel nut of the present utility model comprises the hollow sleeve of the certain intensity of a tool, uniform 3～4 expansion slots of its lower end tube wall, its upper end is provided with internal thread, and the lower end is the diminishing taper hole of an internal diameter, is provided with blow core in the pipe, this upper end of hitting core is a cylinder, and the lower end is a cone.

Be economical with materials, reduce cost, but emphasis is with the screw section thickening of described sleeve pipe upper end tube wall, internal thread is located at this thicker part, or the upper end that makes this sleeve pipe is evenly equipped with 3～4 inside lug bosses, the axial length of this lug boss is suitable with described internal thread length, and described internal thread is located at this lug boss.

For prevent that described sleeve pipe from rotating in preformed hole, it is protruding to be provided with several anti-rotations at the upper end of described sleeve pipe outer wall, and it is protruding that its lower end outer wall also can be provided with several anti-rotations.

Advantage of the present utility model is: easy to use, only need impact the described core that hits with a special tool, and can the expansion swivel nut insert in the preformed hole on the building; Because it is protruding that the front-end and back-end of described swivel nut all are provided with anti-rotation, rotates in the preformed hole of building so can prevent it; Can select the set screw of all lengths and form during use as required; Not the time spent, behind the dismounting set screw, no exposed parts does not influence the attractive in appearance of original building.Be specially adapted on reinforced concrete construction outstanding addendum part, fixed pipelines, door and window, dress furred ceiling and engineering such as joist regularly.

Now the utility model is described in further detail in conjunction with several embodiments.

Fig. 1 is embodiment's 1 an of the present utility model schematic representation;

Fig. 2 is embodiment's 2 an of the present utility model schematic representation;

Fig. 3 is embodiment's 3 an of the present utility model schematic representation;

Fig. 3 A is embodiment's 3 an of the present utility model A-A sectional view;

Fig. 1 is the embodiment 1 of a kind of core-striking type expansion swivel nut of the present utility model, the hollow sleeve 1 that comprises the certain intensity of a tool, this sleeve pipe can be metal, plastics or other materials, its lower end tube wall is uniform 3～4 expansion slots 11 vertically, the upper end of described sleeve pipe is provided with internal thread 12, and its lower end is the diminishing taper hole 13 of an internal diameter, is provided with blow core 2 in the pipe, this upper end of hitting core is a cylinder 21, and the lower end is a cone 22.

That shown in Figure 2 is embodiment 2 of the present utility model, and its basic structure is identical with embodiment 1, but place, tube wall screw section, described sleeve pipe upper end is thicker.Can guarantee the degree of depth of internal thread 12 like this, the remaining part of sleeve pipe 1 still can adopt tube wall than thin material.

That shown in Figure 3 is embodiment 3 of the present utility model, its basic structure and embodiment 1

That shown in Figure 3 is embodiment 3 of the present utility model, its basic structure is identical with embodiment 1, but in order to save material, when caliber, wall thickness and the internal thread degree of depth of sleeve pipe 1 are not complementary, also can locate, along the circumferential direction process 3～4 uniform inwardly protruding portions 14 in the screw section of the upper end of this sleeve pipe 1 tube wall, the length of the axial length of this lug boss 14 and described internal thread 12 is suitable, and described internal thread 12 is located on this lug boss 14, is to be similar to the incomplete thread that round tooth is pulled.Fig. 3 A illustrates the sectional view of this lug boss.

For prevent that described sleeve pipe 1 from rotating in preformed hole, can be provided with several anti-rotations protruding 15 at the upper end of described sleeve pipe 1 outer wall, its lower end outer wall also can be provided with several anti-rotations protruding 16, described anti-rotation protruding 15 or 16 can be one, also can be a plurality of, as uniform 2 or 3, or adopt gear hobbing, annular knurl technology form one week projection, shown in Figure 1 is the situation that there are 2 anti-rotations protruding 15 upper end.

During use, after sleeve pipe placed preformed hole on the building, as long as knock the core that hits in the sleeve pipe with instrument, the pressure spreading of core is hit in the sleeve pipe lower end, promptly tightly is stuck in the preformed hole, according to the difference of the fixing object of desire, the screw of adapted difformity and length or bolt, object can be fixed on the building, easy to use, simple to operate.

Claims

1 one kinds of core-striking type expansion swivel nuts, the hollow sleeve that comprises the certain intensity of a tool, uniform 3～4 expansion slots of its lower end tube wall, the upper end that it is characterized in that described sleeve pipe is provided with internal thread, its lower end is the diminishing taper hole of an internal diameter, be provided with blow core in the pipe, this upper end of hitting core is a cylinder, and the lower end is a cone.

2 core-striking type expansion swivel nuts according to claim 1 is characterized in that the screw section of described sleeve pipe upper end tube wall is thicker, and described internal thread is located at this thicker part.

3 core-striking type expansion swivel nuts according to claim 1 is characterized in that the upper end of described sleeve pipe is evenly equipped with 3～4 inside lug bosses, and described internal thread is located at this lug boss.

4 according to claim 1,2 or 3 described core-striking type expansion swivel nuts, and it is protruding that the upper end outer wall that it is characterized in that described sleeve pipe is provided with several anti-rotations.

5 according to claim 1,2 or 3 described core-striking type expansion swivel nuts, and it is protruding that the lower end outer wall that it is characterized in that described sleeve pipe is provided with several anti-rotations.

6 according to claim 1,2 or 3 described core-striking type expansion swivel nuts, and it is protruding that the upper end outer wall that it is characterized in that described sleeve pipe is provided with several anti-rotations, and it is protruding that the lower end outer wall of described sleeve pipe also is provided with several anti-rotations.