CN2333836Y

CN2333836Y - Strong anchoring expansion bolt

Info

Publication number: CN2333836Y
Application number: CN 98235303
Authority: CN
Inventors: 储江涛; 阚小勇; 祝亦霖; 邹鲜江
Original assignee: Dazhu Building Science & Technology Co Ltd Wuhan City
Current assignee: Dazhu Building Science & Technology Co Ltd Wuhan City
Priority date: 1998-02-25
Filing date: 1998-02-25
Publication date: 1999-08-18
Anticipated expiration: 2008-02-25

Abstract

The utility model relates to a strong anchoring expansion bolt which is composed of an expansion bolt body, an awl rod and a propeller rod. The expansion bolt body is a cylinder body, and the tail part is provided with a crossed opening and the outer cylinder surface of the tail part is provided with a plurality of loops of circular gears. The inner part of the bolt body is interpenetrated by a centre hole, a taper bore and a coaxial line of the tail bore. The taper post is a cylinder body with a taper head and a small table tail to be arranged in the centre hole and the taper bore. The propeller rod is a screw rod or a quick-packaged rod without a screw thread. When in use, the propeller rod makes the awl rod squeeze into the tail bore to expand the tail part and the awl rod is pressed into an anchoring body to simultaneously complete the anchorage of the expansion bolt body and the mounting of fixing the workpiece. The propeller rod can be pulled out to be served as an embedding nut. The anchoring depth of the utility model is adjustable and the anchorage is stable and the anchoring expansion bolt is convenient to disassemble and assemble. The strong anchoring expansion bolt has the advantages of simple structure, labor saving and material saving.

Description

A kind of powerful anchoring EXPANSION ANCHOR BOLTS

The utility model belongs to a kind of EXPANSION ANCHOR BOLTS, a kind ofly specifically both can tighten up object, can do the powerful anchoring EXPANSION ANCHOR BOLTS that is embedded into nut again.

Metal bolts casing wall thickness commonly used can only reach 1～1.5mm, and length of embedment also can only be at 60～150mm, and screw rod progressively withdraws from fastening process, therefore withdrawal resistance and shearing resistance are very low, casing wall is too thin in addition, so its expansion coefficient is very little, also be easy to because of corrosion ineffective.

Chinese patent CN92205294.8 discloses a kind of " multifunctional expanded bolt " (applying date 920324, notice of authorization day 930505) it by expansion key, expansion core bar, form towards core bar.The expansion key is a cylindrical body, and the cap of a diameter greater than it arranged at its top; Tail end has the cross gap, the key center has a threaded core hole, will be when the core hole be thrown into towards core bar, promote the expanded core masthead and go within the walls, tail end expands, and can play the role of fastening, this model utility has simple installation, withdrawal resistance and shearing resistance increase, and especially can do embedded nut, but have following defective:

1, the existence of solid key cap makes anchorage depth non-adjustable on the expansion key; And the key cap in big footpath increases the blank materials, and manufacturing procedure increases, thereby expense improves.

2, for guaranteeing certain anchorage depth, it is longer that key must be made, and key is long more, and core hole and screw thread manufacturing are difficult more, and easy damaged making cutter, thereby increased difficulty of processing and processing cost.

3, when when being embedded into nut and using, outstanding metope of its key cap or ground, cause mounting article and wall, ground sky every, only depend on that minimum area contacts mounting article on its cap, instability is installed.

Can not progressively regulate compaction forces when 4, relying on its key cap mounting article, need external force that mounting article is exerted pressure, and mounting article can not be by repeated disassembled and assembled.

5, the long approximately 5～10mm of key tail end, expansion coefficient is still little.

The utility model purpose is intended at above-mentioned deficiency, and a kind of anchorage depth can regulate is provided, and expansion coefficient increases, do not have projection when work is embedded into nut, structure is simpler, labor and material saving, and anchoring strength increases greatly, a kind of powerful anchoring EXPANSION ANCHOR BOLTS of easy accessibility.

The purpose of this utility model realizes in the following manner: a kind of powerful anchoring EXPANSION ANCHOR BOLTS, form by expansion key, awl bar and push rod, the expansion key is the cylindrical body that an afterbody has the cross opening, its inside is by the coaxial perforation of threaded center, conical bore and uropore, and the afterbody outer cylinder has the above annular tooth of 1 circle; The awl bar is the cylindrical body of a diameter than band conical head more than the little 0.3mm of center hole, is positioned among expansion key center hole and the conical bore.

The awl bar conical head the other end has the roundlet platform tail of a diameter less than the awl shank diameter.

Cross opening expansion key afterbody length 〉=20mm is arranged.

The utility model expansion key is not with cap, thereby anchorage depth can regulate arbitrarily as required, needs deeply, just select longer master screw for use, and the expansion bolt body length need not change, and is machinable shorter, thereby saving of labor, material-saving.

Key is not with cap, thereby as being embedded into the no projection in the pre-buried back of nut, makes the installation of mounting article reliable and stable, and easy accessibility.

Awl bar tail diameter is less than the little round platform of awl shank diameter, makes to turn screw rod in the operation or make the fast-assembling bar more laborsaving, and is difficult for sanding silk mouth or generation finning.

The utility model content is described in detail in detail with reference to the accompanying drawings.

Fig. 1 is the utility model structural representation side view

Fig. 2 is the utility model structural representation

Fig. 3 is one of the utility model user mode figure

Fig. 4 is two of the utility model user mode schematic representation

Fig. 5 is three of the utility model user mode schematic representation

Embodiment 1

This EXPANSION ANCHOR BOLTS is made up of expansion key 1, awl bar 2, screw rod 3, band cap screw rod 3 is a universal standard part, expansion key 1 is a cylindrical body, its afterbody has the cross opening of long 25mm, the afterbody outer cylinder has four circle ring teeth 8, there is threaded center hole 5 key inside, and uropore 6 and conical bore 7 coaxial lines connect; Awl bar 2 is contained in the key center, is the cylindrical body of a diameter than band conical head more than the little 0.3mm of internal diameter of center hole 5 and roundlet platform tail.When (see figure 2) is used, key is put into building 11, in the pre-drilled hole of fixture 12, turn screw rod 3, thereby promote awl bar 2, make it to clamp-on uropore 6, with expansion key afterbody distending and be pressed in the anchoring body 11, finish anchoring and mounting article simultaneously and install.(seeing Fig. 3, Fig. 4)

Embodiment 2

This EXPANSION ANCHOR BOLTS is made up of expansion key 1, awl bar 2, fast-assembling bar 9, the fast-assembling bar is the auxiliary equipment of diameter less than center bore, the expansion key is a cylindrical body, afterbody has the cross opening of 25mm, the afterbody outer cylinder has 4 circle annular tooth 8, its inside is connected by threaded center hole 5, uropore 6 and conical bore 7 coaxial lines, awl bar 2 be a diameter less than center hole and conical head is arranged and the cylindrical body of roundlet platform tail, be positioned among center hole 5 and the conical bore 7.By hitting the fast-assembling bar, will bore bar 2 and clamp-on in the uropore 6, finish the expansion anchoring of expansion key 1, take out the fast-assembling bar, promptly on the basis, stay required embedded nut.(see figure 5)

Claims

1. powerful anchoring EXPANSION ANCHOR BOLTS, form by expansion key, awl bar and push rod, the key that it is characterized in that expanding is the cylindrical body that an afterbody has the cross opening, and its inside is by the coaxial perforation of threaded center hole, conical bore and uropore, and the afterbody outer cylinder has the above annular tooth of 1 circle; The awl bar is the cylindrical body of a diameter than band conical head more than the little 0.3mm of center hole, is positioned among expansion key center hole and the conical bore.

2, EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that the described awl bar conical head the other end has the roundlet platform tail of a diameter less than the awl shank diameter.

3, EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that the described cross opening expansion key afterbody length 〉=20mm that has.