CN2036599U

CN2036599U - Expansion bolt with blocking head

Info

Publication number: CN2036599U
Application number: CN 88208704
Authority: CN
Inventors: 徐景江
Original assignee: KUNMING IRON AND STEEL WORKS
Current assignee: KUNMING IRON AND STEEL WORKS
Priority date: 1988-07-16
Filing date: 1988-07-16
Publication date: 1989-04-26

Abstract

The utility model relates to an expansion bolt with a blocking head which belongs to the expansion screw field. An expansion sleeve with taper is adopted by the utility model to instead of a prior barrel type expansion sleeve, so the good self-locking connection can be realized. The utility model has the advantages of shock resistance, high reliability, simple structure and convenient operation. The blocking head structure is arranged at the end head of the thread of the bolt rod, so the tightening hold can be realized; when the components are released, the looseness which is caused by the hammer blow can be realized. The expansion bolt with a blocking head can be used for the connection of the blind hole metal seat and the external connecting element, so the use range of the expansion bolt is enlarged. While in use, the seriation can be formed according to the connection force need.

Description

Expansion bolt with blocking head

The utility model belongs to the swell fixture field.

Normally used expansion bolt, just the expander roll section has tapering to compress with garden tubular expansion set, but expansion set and swollen bar are difficult for pressing very tightly mutually, power transmission inhomogeneous (because of the expansion set inner ring do not have corresponding tapering, so just one section of expansion set contact with swollen bar), thereby its connection self-locking property is bad, and anti shock and vibration poor (because of both junction planes not quite, still have the space), it is unreliable to connect.Owing to there is not corresponding dop be easy to clamping when linking part and tighten for tightening in its end, when swollen bar and expansion set self-locking were bad, its bolt shank will be movable and the parts that connect can not be clamped with it, and was same, also has this problem when the dismounting parts.In addition, the common expansion bolt of usefulness, can only be used for that the Structural Hardware frame is connected to that brick mixes or the concrete structure body of wall in, and can't be used for connecting of blind hole metallic base and external piece, its application area is restricted.

Chinese patent utility model patent communique by retrieval, do not find the same Patent report, has only the fastening suspension hook of an expansion (GG87210801), adopt threaded straight-bar and two wedge pipes of expansion tube nut to form its fixed end, but its structure is complicated, fitting operation inconvenience, and the end is hook, coupling member is unreliable, can not be used for simultaneously connecting of blind hole metallic base and external piece.

The purpose of this utility model is: provide a kind of simple in structure, connect solid and reliablely, shock resistance is convenient to clamp and dismounting, can be used for the expansion bolt that the blind hole metallic base connects with outer part simultaneously.

The utility model is achieved in that the expansion bolt of band dop, bolt shank 1 by the swollen bar section with band certain taper constitutes with the expansion set with radial opening 2 and nut, the packing ring that are placed in swollen bar section, and its special way is that bolt shank 1 screw thread front end has dop; And expansion set 2 is to roll the inner conical garden tubular that forms by the slim oblique band that has constant slope, and its radial symmetric fourth class office has three and is about its axial length 1/3～1/2 opening, and another symmetry place is standard-sized sheet mouth (being not involution of wiredrawn edge).

The utility model expansion set 2 inner ring gradients are 4 °～6 °.

The utility model bolt shank 1 thread section front end dop can be square, inside and outside hexagon, and flat, interior square, draw-in groove etc.

The utility model has been owing to adopted inner ring that the expansion set of certain taper is arranged, and makes to be the conical surface between swollen bar section and expansion set and to compress mutually, guaranteed that power transmission is even, and it is good to make it connect self-locking property, and anti shock and vibration, has improved coupling reliability.Because the end does not have dop, more normally used expansion rod is easy to clamping and tightens, and when removing connection, dismounting parts, dop is also provided convenience for pounding with a hammer.Owing to adopted new structure, make it can be applicable to connecting of blind hole metal seat and external piece, solved and when the blind hole seat connects with external piece, adopted double threaded screw usually, go into after one section of blind hole ruptures, repair difficulty, and machining hole, tapping complicated problems, the connection of this band dop expansion bolt adopted, only need have openning hole get final product, dismantles also need only hammer into shape and knocks pine and can take out.

Fig. 1 is the utility model plan view;

Fig. 2 is the utility model expansion set and unfolded drawing thereof

Fig. 3 is the utility model dop various forms figure.

Fig. 4 is the utility model and the metal blind hole base schematic representation that links.

Below in conjunction with description of drawings embodiment of the present utility model:

As Fig. 1, Fig. 2, shown in Figure 3, the expansion bolt of band dop is made of the bolt shank 1 with swollen bar section of being with certain taper and the expansion set with radial opening 2 and nut, the packing ring that are placed in swollen bar section; Bolt shank 1 thread section front end has the dop of different shape (square, inside and outside hexagon, flat, interior square, draw-in groove etc.); Expansion set 2 is rolled by the slim oblique carrying material that has constant slope and forms inner cone (gradient is 4 °～6 °) shape garden tubular, its radial symmetric fourth class office has three openings that are about its axial length 1/3～1/2, and another symmetry place is standard-sized sheet mouth (being not involution of rollback).

During use, be stuck in bolt shank 1 front end dop, can must be anchored on the matrix by nut and spring washer by coupling member with wrench or other clamping apparatus; Remove connection, during the dismounting parts, can directly use the hammering dop so that loosening the taking-up.

Fig. 4 shows the utility model and is used for the situation that the blind hole metallic base connects with external piece, need only have openning hole on metallic matrix, puts into this expansion bolt and can connect outer part; The pine that need only hammering during dismounting falls can be taken out.

The utility model is simple in structure, can form seriation according to connecting the power needs, uses in order to make.

Claims

1, a kind of expansion bolt with dop is made of the bolt shank 1 with swollen bar section of being with certain taper and the expansion set with radial opening 2 and nut, the packing ring that are placed in swollen bar section, it is characterized in that bolt shank 1 thread section front end has dop; Expansion set 2 is to roll the inner conical cylindrical shape that forms by the slim oblique band that has constant slope, and its radial symmetric fourth class office has three openings that are about its axial length 1/3～1/2, and another symmetry place is standard-sized sheet mouth (being not involution of wiredrawn edge).

2, the expansion bolt of band dop according to claim 1 is characterized in that expansion set 2 inner ring gradients are 4 °～6 °.

3, the expansion bolt of band dop according to claim 1 and 2, it is square to it is characterized in that bolt shank 1 thread section front end dop can be, inside and outside hexagon, flat, interior square, draw-in groove etc.