CN2816451Y

CN2816451Y - Wall-use expanding screw bolt

Info

Publication number: CN2816451Y
Application number: CN 200520062634
Authority: CN
Inventors: 瞿滨
Original assignee: Individual
Current assignee: FUJIAN PENGKUN INDUSTRY Co Ltd
Priority date: 2005-08-05
Filing date: 2005-08-05
Publication date: 2006-09-13
Anticipated expiration: 2015-08-05

Abstract

The utility model relates to a wall-use expansion screw bolt which is composed of a screw nut, a screw rod and at least two expansion pieces, wherein the screw rod can be divided into two parts, the inner sides and the outer sides of which are respectively thin and thick; the inner section is thinner and is provided with threads; the screw nut is screwed on the thread section; the outer section is thicker and the end part is provided with a screw bolt head used for screwing; a plurality of expansion pieces are sheathed on the inner section of the screw rod one by one; the same end of each of the expansion pieces is formed into a plurality of expansion pieces through the arrangement of a plurality of lancings by cutting, and the other end of each of the expansion pieces is formed into a wedge-shaped face; the screw nut and outer section of the screw rod are also formed wedge-shaped faces corresponding to the expansion pieces. The fit of the utility model can be firm by the structure; the utility model has the advantages of favorable self locking performance, anti-puling force performance, stability, anti-shearing performance, convenient installation and free disassembly.

Description

The wall EXPANSION ANCHOR BOLTS

Technical field

The utility model relates to the technical field of wall with EXPANSION ANCHOR BOLTS.

Background technique

The wall of commonly using with the EXPANSION ANCHOR BOLTS structure as shown in Figure 1, form by nut 1 ', screw rod 2 ' and expansion piece 3 ', the inner of screw rod 2 ' forms sphenocephaly 21 ', expansion piece 3 ' is nested with on screw rod 2 ', and expansion piece 3 ' is established several sections joint-cuttings 31 ' and formed several intumescent sheets 32 ' by cuing open near an end of screw rod 2 ' sphenocephaly 21 '.

During use, on body of wall, hole earlier, expansion piece 3 ' is nested with on screw rod 2 ', and inwardly with the sphenocephaly 21 ' of screw rod 2 ', insert in the pre-drilled porthole together with expansion piece 3 ', make the outer end of screw rod 2 ' only stay segment screw thread 22 ' to be exposed at outside the wall, again plug-in thing A ' is hung on this segment that screw rod 2 ' exposes, nut 1 ' is screwed on this segment screw thread 22 ', by fastening nut 1 ' and stopped by plug-in thing A ', driving screw rod 2 ' outwards moves, sphenocephaly 21 ' the extrusion expansion sheet 32 ' of screw rod 2 ' outwards struts intumescent sheet 32 ', closely cooperates with porthole, prevent that screw rod 2 ' from loosing from porthole, reach standing screw 2 ' and plug-in thing A ' is fastened on the effect of screw rod 2 '.

Make a general survey of the wall EXPANSION ANCHOR BOLTS of commonly using, be not difficult to find that there is following shortcoming in it:

One, owing to only has an expansion piece 3 ', whole bolt has only a circle intumescent sheet 32 ' to closely cooperate with porthole, so, the soundness that cooperates is poor, and the gap between expansion piece 3 ' and the porthole is bigger again, and the gap between expansion piece 3 ' and the screw rod 2 ' is also bigger, make screw rod 2 ' very easily loosening in porthole, the stretching resistance poor performance, poor stability, self-lock ability are also poor;

Two, because the diameter of screw rod 2 ' is less, anti-shear ability is poor;

Three, because the self-lock ability of screw rod 2 ' is poor, during fastening nut 1 ', need between plug-in thing A ' and nut 1 ', add and put spring washer 4 ', make installations, dismantle inconvenience;

Four, because the diameter of screw rod 2 ' is less, in the time of will knocking screw rod 2 ' and go into porthole, knock impairedly for the outer end that prevents screw rod 2 ', need earlier nut 1 ' to be screwed on or fill up other object, and after screw rod 2 ' quilt is knocked in the porthole, need unload lower nut 1 ' or other object again, plug-in thing A ', spring washer 4 ' are loaded onto one by one, the tired lock of program is when high-lift operation again, more sense operation inconvenience, the dangerous increase.

The model utility content

The purpose of this utility model is to provide a kind of wall EXPANSION ANCHOR BOLTS, and it cooperates firmly, has good self-lock ability, stretching resistance performance, stability and anti-shear ability, and easy for installation, and dismounting freely.

To achieve these goals, the utility model is made up of nut, screw rod and two expansion pieces at least, thin in screw rod is divided into, outer thick two sections, in section thin and have a screw thread, nut driving is on this thread section, outer section has the bolt head that is used to screw than thick and end, several expansion pieces are nested with one by one on section in the screw rod, and the same end of each expansion piece is established several sections joint-cuttings and is formed several intumescent sheets by cuing open, the other end then forms sphenoid surface, and nut also forms sphenoid surface with outer section corresponding intumescent sheet of screw rod.

Wherein, the diameter of the outer section of above-mentioned screw rod is consistent with the porthole diameter.

Above-mentioned bolt head directly is integrally formed in the end of the outer section of screw rod.

The end portion of the outer section of above-mentioned bolt head and screw rod is body formed, and interior threaded hole is offered in the end of section outside screw rod, and the first end of bolt cooperates the end that is fixed on the outer section of screw rod with interior threaded hole.

Above-mentioned each expansion piece is established several sections joint-cuttings and is formed several intumescent sheets by cuing open towards an end of nut, and the corresponding intumescent sheet of nut forms sphenoid surface.

One end of above-mentioned each expansion piece section outside screw rod is established several sections joint-cuttings and is formed several intumescent sheets by cuing open, and outer section corresponding intumescent sheet of screw rod forms sphenoid surface.

Be provided with position structure between that end of close nut and the nut in the above-mentioned expansion piece.

Above-mentioned position structure is formed by the groove and the cooperation of protruding wall that are formed on nut and the expansion piece, cooperates with protruding wall by this groove to make nut be connected the location with expansion piece.

After adopting said structure, when the utility model is installed, on body of wall, hole, several expansion pieces are nested with on section in the screw rod, and with nut be spun on screw rod on the section, more plug-in thing is hung on outer section of screw rod, then, with nut inwardly, insert in the pre-drilled porthole, screw screw rod and get final product together with expansion piece, screw rod.

The utility model is compared with EXPANSION ANCHOR BOLTS with the wall of commonly using, and has the following advantages:

One, owing to have a plurality of expansion pieces, when screw rod screwed, whole bolt had multi-turn intumescent sheet and porthole to closely cooperate, so, cooperate firmly, when the screw rod tension, tension uniform be distributed in screw rod in the section on, stress distribution is even, thereby has promoted the tensile strength of screw rod effectively;

When two, screw rod screwed, a plurality of expansion pieces were squeezed, and the support force that acts in the screw rod on the section evenly distributes, thereby had promoted the stability of screw rod effectively;

When three, screw rod screwed, a plurality of expansion pieces were squeezed along the screw rod direction, and screw flight is produced constraint, thereby had produced the self-lock force of screw rod effectively;

Four, since the diameter of the outer section of screw rod greater than the diameter of lining section, thereby promoted the shear strength of screw rod effectively;

Five, because the self-lock ability of screw rod is strong, the diameter of the outer section of screw rod is big, during installation, directly knocks screw rod and goes into porthole, and tighten screw rod and get final product, does not put spring washer etc. and do not need to add in addition, installation, convenient disassembly.

Description of drawings

Fig. 1 commonly uses the three-dimensional exploded view of wall with EXPANSION ANCHOR BOLTS;

Fig. 2 commonly uses the use schematic representation of wall with EXPANSION ANCHOR BOLTS;

Fig. 3 is the utility model embodiment one a structural representation;

Fig. 4 is the utility model embodiment one a use schematic representation;

Fig. 5 is the utility model embodiment two a structural representation;

Fig. 6 is the utility model embodiment two a use schematic representation.

Embodiment

Shown in Fig. 3 and 5, be two kinds of forms of the present utility model, form by nut 1, screw rod 2 and at least two expansion pieces 3 (number of expansion piece 3 can be decided according to need).

Thin in screw rod 2 is divided into, outer thick two

section

21,22, in section 21 thin and have a screw thread, nut 1 is screwed on this thread section, outer section 22 has the bolt head 23 that is used to screw than thick and end, bolt head 23 can directly be integrally formed in the end of screw rod 2 outer sections 22 as shown in Figure 3, also can be as shown in Figure 5 body formed with the end portion of screw rod 2 outer sections 22, interior threaded hole 25 be offered in the end of section 22 screw rod 2 outside, and bolt head 23 1 ends cooperate with interior threaded hole 25 and are fixed on outside the screw rod 2 sections 22 end.The diameter of screw rod 2 outer sections 22 is consistent with the porthole diameter to be good (as shown in Figure 4).

Several expansion pieces 3 are nested with one by one on section 21 in the screw rod 2, and the same end of each expansion piece 3 by cut open establish several sections joint-cuttings form several intumescent sheets 31 (this structure with commonly use structural similarity, so do not do three-dimensional icon), the other end then forms sphenoid surface 32, nut 1 also forms sphenoid surface 11 and 24 with outer section 22 corresponding intumescent sheet 31 of screw rod 2, specifically, shown in Fig. 3 and 4, each expansion piece 3 section end of 22 outside screw rod 2 is established several sections joint-cuttings and is formed several intumescent sheets 31 by cuing open, outer section 22 corresponding intumescent sheet 31 of screw rod 2 forms sphenoid surface 24, also can be as illustrated in Figures 5 and 6, each expansion piece 3 is established several sections joint-cuttings and is formed several intumescent sheets 31 by cuing open towards an end of nut 1, and nut 1 corresponding intumescent sheet 31 forms sphenoid surface 11.

In the embodiment shown in fig. 3, tight a bolt in order to be beneficial to, be provided with position structure between that and the nut 1 near nut 1 in the expansion piece 3, the structure of this position structure has a lot, as shown in Figure 3,

groove

12 and 33 cooperations of the protruding wall on the expansion piece 3 by nut 1 form, and cooperate with protruding wall 33 by this groove 12 to make nut 1 be connected the location with expansion piece 3.In like manner, in the embodiment shown in fig. 5, also can be in expansion piece 3 near being provided with position structure between that end of screw rod 2 and the screw rod 2.

When the utility model is installed, as Fig. 4, shown in 6, on body of wall, hole, several expansion pieces 3 are nested with on section 21 in the screw rod 2, and with nut 1 be spun on screw rod 2 in the section 21 on, again plug-in thing A is hung on outer section 22 of screw rod 2, then, with nut 1 inwardly, together with expansion piece 3, screw rod 2 inserts in the pre-drilled porthole together, screw screw rod 2, several expansion pieces 3 are squeezed and produce distortion, intumescent sheet 31 outwards struts, screw rod 2 screw threads are produced constraint, produce self-lock force, be beneficial to screw rod 2 and screw, order is installed more convenient, when being threaded to intumescent sheet 31 and closely cooperating, even screw rod 2 with porthole, intumescent sheet 31 and porthole are firm, stably cooperate, if pulling screw rod 2, tension uniform be distributed in screw rod 2 in the section 21 on, stress distribution is even, thereby prevents that effectively screw rod 2 from loosing from porthole, and tensile strength is strong, reach the effect of standing screw 2, simultaneously, plug-in thing A is fastened on the screw rod 2 by bolt head 23, and, because the diameter of screw rod 2 outer sections 22 is obviously bigger than commonly using screw rod 2 ', so can promote the shear strength of screw rod 2 effectively.

Claims

1, wall EXPANSION ANCHOR BOLTS, it is characterized in that: form by nut, screw rod and at least two expansion pieces, thin in screw rod is divided into, outer thick two sections, in section thin and have a screw thread, nut driving is on this thread section, outer section has the bolt head that is used to screw than thick and end, several expansion pieces are nested with one by one on section in the screw rod, and the same end of each expansion piece is established several sections joint-cuttings and is formed several intumescent sheets by cuing open, the other end then forms sphenoid surface, and nut also forms sphenoid surface with outer section corresponding intumescent sheet of screw rod.

2, wall EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: the diameter of the outer section of screw rod is consistent with the porthole diameter.

3, wall EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: bolt head directly is integrally formed in the end of the outer section of screw rod.

4, wall EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: the end portion of the outer section of bolt head and screw rod is body formed, and interior threaded hole is offered in the end of section screw rod outside, and the first end of bolt cooperates the end that is fixed on outside the screw rod section with interior threaded hole.

5, wall EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: each expansion piece is established several sections joint-cuttings and is formed several intumescent sheets by cuing open towards an end of nut, and the corresponding intumescent sheet of nut forms sphenoid surface.

6, wall EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: an end of each expansion piece section outside screw rod is established several sections joint-cuttings and is formed several intumescent sheets by cuing open, and outer section corresponding intumescent sheet of screw rod forms sphenoid surface.

7, as wall EXPANSION ANCHOR BOLTS as described in claim 1 or 6, it is characterized in that: in the expansion piece near being provided with position structure between that end of nut and the nut.

8, as wall EXPANSION ANCHOR BOLTS as described in the claim 7, it is characterized in that: position structure cooperates and forms by being formed on groove on nut and the expansion piece and protruding wall, cooperates with protruding wall by this groove to make nut be connected the location with expansion piece.