CN2542873Y - Equal pipe anchor expansion bolt - Google Patents

Abstract

The utility model relates to a hitting core type expansion suppository to fasten objects, mainly comprises an expansion suppository made of metal tubes and a hitting core, wherein the expansion suppository head has a dismantling type and a fixed type according to need, a tail is made into an anchor type expansion head with a one groove or a cross groove, the hitting core is in coordination in a hole cavity of the expansion suppository, and when installed, an anchor head quickly expands and hooks invertedly inside a building to reduce production difficulty and save raw materials by adopting the metal tubes as the expansion suppository, which is characterized in that the utility model has simple structure, convenient manipulation, big anchored power, high shear strength, long effective length, labour-saving hitting core, easy production and convenient popularization, widely applied in equipment installation, engineering building and decoration fields.

Description

Isometrical pipe anchor formula expansion bolt

The utility model relates to and a kind of object is fastened on expansion bolt on the building, particularly a kind of core-striking type expansion bolt.

At present in the EXPANSION ANCHOR BOLTS of generally using, opening the cross recessed expand tube by the screw rod of a solid band expansion-head and one is that main body is formed, and it screws screw rod by nut and forces expand tube to expand to reach fastening purpose.This EXPANSION ANCHOR BOLTS is owing to there is the existence of expand tube, causes operation inconvenience, positioning performance is poor, effective length is short, lose fastening effect easily.

According to the retrieval, another kind of EXPANSION ANCHOR BOLTS, as the patent No.: 99236559.7 " hollow expansion bolt " and the patent No.: the key of 94239869.6 " a kind of bumping type EXPANSION ANCHOR BOLTS " is all made with solid round steel punching.Its structure is one to be drilled with the round steel of deep hole, on head or the entire body external diameter screw thread is arranged, afterbody be cross recess or straight groove expansion bolt and one and the bump nail of aperture same diameter form.It forces empennage to expand to reach the purpose of swelling by nail hitting.This EXPANSION ANCHOR BOLTS expand tube and bolt are integral, simple in structure, effective length is long, shear strength is high, connection is reliable, easy to operate, overcome the deficiency of above-mentioned solid expansion.But this EXPANSION ANCHOR BOLTS, the vestibule manufacture difficulty is too big, is difficult for popularizing, and deficiency is on its structure: 1, the big pressure of empennage expansion area is little, and nail hitting needs greater impact power; 2, cross recess incision empennage inner chamber becomes corner angle, no circular hole, and it is eccentric easily to impact nail during expansion, influences fastening quality.

The utility model is by adopting metal tube as the expansion key, and makes anchor type expanding head at afterbody, need not punch, reach manufacture difficulty little, save raw material, constant intensity height, simple to operate laborsaving, the purpose of being convenient to popularize.

The utility model is to be made of expansion bolt 1 and impact core 2 that metal tube is made.The expansion bolt head can be made into the die formula of the disassembly-type or the die 7 of screw thread 4 as required.Afterbody is made anchor type expanding head 3, is the overhead kick shape, and has a word or cross recess 6.Impact core 2 is engaged in the vestibule of expansion bolt 1, can run through wherein.

The utility model is described in further detail below in conjunction with accompanying drawing

Fig. 1, be the isometrical pipe anchor of the utility model formula expansion bolt disassembly-type, the structural representation before using.Fig. 2, be the isometrical pipe anchor of the utility model formula expansion bolt, the structural representation of impact core.Fig. 3, the 4th, the isometrical pipe anchor of the utility model formula expansion bolt is fixed, the structural representation after the use.

Referring to accompanying drawing, expansion bolt 1 usefulness metal tube of the present utility model is made, afterbody is an anchor type expanding head 3, be Rotary-table (Fig. 3) 3 Rotary-tables during expansion and open a word or cross recess 6, groove depth is greater than the height of Rotary-table (Fig. 3) 3, the large diameter-ratio expansion key diameter of Rotary-table (Fig. 3) 3 is thick approximately 30%, highly accounts for 7% of expansion bolt length overall.Anchor type expanding head 3 fluting place closures before using, big footpath and isometrical (Fig. 1) 3 of expansion bolt diameter, the middle guiding small sircle hole 5 that is formed with naturally.Need dismantle as fastener and can select bolt type (Fig. 1) for use, the head end external diameter has screw thread 4, and not needing dismounting can select die formula (Fig. 3) head end for use is die 7.Impact core 2 diameters slightly are defeated by expansion bolt endoporus aperture, and its isometrical part of length is identical with the expansion bolt length overall, and afterbody is a cone, and head has cap head or without a head, and without a head suitable be used in combination with die formula (Fig. 3) is not quick detachable.During installation, on building, bore earlier one with the isometrical hole of expansion bolt, then the expansion bolt combination is inserted in the architectural openings, be shelved on fastener or the architectural openings face to nut or die 7 after, impact its core to the cap head touch mutually with the mouth of pipe or concordant (impact core without a head) till.This moment anchor type expanding head 3 expansions and overhead kick is in building, and pressure is big during expansion and little because anchor type expanding head 3 hook parts are sharp, and is laborsaving when therefore hitting core, little to the building destruction area.Simultaneously because eccentric phenomena has been avoided in the effect of guiding circular hole 4.

That characteristics of the present utility model are is simple in structure, easy to operate, anchor force big, shear Intensity height, effective length be long, hit that core is laborsaving, guiding just, easy to manufacture, save material, Be convenient to popularize, can be widely used in equipment engineering construction and decoration field are installed.

Claims (3)

1, the isometrical expansion bolt of a kind of fastener body and function, it is characterized in that expansion bolt (1) and the impact core (2) made by metal tube constitute, the expansion bolt head has screw thread (4) or die (7), afterbody is anchor type expanding head (3) and has a word or cross recess (6) that impact core (2) is engaged in the vestibule of expansion bolt (1).

2,, it is characterized in that expansion bolt (1) makes with metal tube by the described expansion bolt of claim 1 (1).

3,, it is characterized in that anchor type expanding head (3) direct forming on key of afterbody by the described expansion bolt of claim 1.

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