CN206608420U

CN206608420U - One kind easily pulls out expansion bolt

Info

Publication number: CN206608420U
Application number: CN201720356669.3U
Authority: CN
Inventors: 邓圈圈
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-04-07
Filing date: 2017-04-07
Publication date: 2017-11-03
Anticipated expiration: 2027-04-07

Abstract

Easily expansion bolt is pulled out the utility model discloses one kind, including dormant bolt, expansion sleeve, plain washer, spring washer and hex nut, the expansion sleeve afterbody is relatively set with two panels expansion piece, and the longitudinal section of every expansion piece is that structure is identical and centering angle is less than 90 ° of arc；The dormant bolt afterbody provided with expansion-head, the edge of the longitudinal section of the expansion-head be in by two relative parallel edges arc-shaped sides relative with two constitute it is run-track shaped；The centering angle of two arc-shaped sides of the expansion-head is respectively less than 90 °, and the maximum spacing of two arc-shaped sides is more than expansion sleeve internal diameter；Two parallel edges of the expansion-head are smaller than the minimum spacing of two expansion pieces.This easily pulls out expansion bolt and can easily taken out as needed using after finishing, and is hardly damaged wall, and the expansion bolt taken out is also reusable.

Description

One kind easily pulls out expansion bolt

Technical field

The utility model is related to a kind of bolt, and in particular to one kind easily pulls out expansion bolt.

Background technology

At present, common expansion bolt construction by the dormant bolt of cone-shaped end, expansion sleeve, plain washer, spring washer and Hex nut is constituted.Expansion sleeve is all filled in the circular hole for the go-no-go accomplished fluently in advance on wall when using, and is then passed through Constantly tighten hex nut, strength is delivered to expansion sleeve by spring shim, plain washer, dormant bolt out of expansion sleeve it is relative to The expansion piece distending of expansion sleeve is made expansion bolt firmly block by outer drawing, the termination of the dormant bolt designed with circular conical surface In the circular hole of wall, that is, complete the installation of expansion bolt.

It can however not it is a defect in expansion bolt design to pull out reuse, the expansion bolt after use gives up Put in wall, the exposed part outside wall has potential safety hazard, made troubles to the construction of metope newly, the raffinate of bolt corrosion Metope is stained, the disposable of expansion bolt wastes substantial amounts of iron and steel resource.It is on the one hand time-consuming to take if extracting by force Power, can destroy the hole on wall, or even damage wall again after on the other hand extracting by force so that can not carry out two using the hole It is secondary to install.

Utility model content

The purpose of this utility model is in order to solve the above-mentioned technical problem easily to pull out expansion bolt there is provided one kind, the expanding screw Bolt can easily take out as needed using after finishing, and be hardly damaged wall, and the expansion bolt taken out is also reusable.

To achieve the above object, the technical solution adopted in the utility model is as follows：

One kind easily pulls out expansion bolt, including dormant bolt, expansion sleeve, plain washer, spring washer and hex nut, described swollen Expansion set afterbody is relatively set with two panels expansion piece, and the longitudinal section of every expansion piece is that structure is identical and centering angle is less than 90 ° Arc；The dormant bolt afterbody is provided with an expansion-head, and the edge of the longitudinal section of the expansion-head is in relative by two It is run-track shaped that the parallel edges arc-shaped side relative with two is constituted；The centering angle of two arc-shaped sides of the expansion-head is respectively less than 90 °, and the maximum spacing of two arc-shaped sides is more than expansion sleeve internal diameter；Two parallel edges of the expansion-head are smaller than two expansions The minimum spacing of piece.

Specifically, the maximum of two arc-shaped sides of the expansion-head is smaller than being equal to expansion sleeve external diameter.

It is preferred that, the spacing of two parallel edges of the expansion-head is identical with dormant bolt diameter.

Compared with prior art, the utility model has the advantages that：

Of the present utility model easily to pull out that expansion bolt is simple in construction, reasonable in design, consumptive material is few, and cost is low, and it is mounted easily Pulling out expansion bolt can easily extract while wall is not damaged, and the expansion bolt extracted is also reusable.

Brief description of the drawings

Fig. 1 is front view of the present utility model.

Fig. 2 is top view of the present utility model.

Fig. 3 is right view of the present utility model.

Fig. 4 is the utility model expansion sleeve expanded schematic diagram.

Wherein, reference is corresponding entitled：

1- dormant bolts, 2- expansion sleeves, 3- plain washers, 4- spring washers, 5- hex nuts, 6- expansion pieces, 7- expansion-heads.

Embodiment

The utility model is described in further detail with embodiment for explanation below in conjunction with the accompanying drawings, and mode of the present utility model includes But it is not limited only to following examples.

The purpose of following examples is to provide a kind of simple in construction, reasonable in design, with low cost and reusable easy Pull out expansion bolt.As shown in figure 1, the easy of following examples pulls out expansion bolt and expansion bolt basic structure phase of the prior art Together, including dormant bolt 1, expansion sleeve 2, plain washer 3, spring washer 4 and hex nut 5, and its connection each other is closed System is also identical with the connected mode of expansion bolt in the prior art, and here is omitted.And specifically improve such as following examples It is described：

Embodiment 1

The improvement that the present embodiment is made compared with the prior art includes the improvement of expansion sleeve 2 and the improvement of dormant bolt.Such as Shown in Fig. 1 ~ Fig. 4, the afterbody of the present embodiment expansion sleeve 2 is relatively set with two panels expansion piece 6, and the longitudinal section of every expansion piece is Structure is identical and centering angle is less than 90 ° of arc；The afterbody of dormant bolt 1 is provided with an expansion-head 7, and the expansion-head is real Core structure, and its longitudinal section edge be in by two relative parallel edges arc-shaped sides relative with two constitute it is run-track shaped； The centering angle of two arc-shaped sides of the expansion-head 7 is respectively less than 90 °, and the maximum spacing of two arc-shaped sides is more than expansion sleeve 2 Internal diameter；Two parallel edges of the expansion-head 7 are smaller than the minimum spacing of two expansion pieces.

The operation principle for easily pulling out expansion bolt of the present embodiment is as follows：

In use, first pass through rotation dormant bolt, make its afterbody expansion-head rotate arc-shaped side to expansion-head with it is swollen Expansion piece on expansion set is corresponded, and then the afterbody for entirely easily pulling out expansion bolt is filled in accomplished fluently in advance on wall certain In the circular hole of bore, after being against to plain washer on wall, by constantly tightening nut, easily pulling out expansion bolt phase out of expansion sleeve It is final easily to pull out expansion bolt firm to for outer drawing, making the expansion-head of dormant bolt afterbody by two panels expansion piece distending It is stuck in the circular hole of wall, completes to install.

And need will easily pull out expansion bolt take out when, first pass through rotation unclamp nut, then by dormant bolt slightly to Pushed up in circular hole, then dormant bolt is rotated by 90 °, make the expansion piece in the expansion-head and expansion sleeve of dormant bolt afterbody wrong Open, you can easily take out this and easily pull out expansion bolt, and the expansion bolt itself extracted is without any infringement, it is reusable；And it is right In wall is original be used to the circular hole of expansion bolt is installed for, in addition to slightly expanding except circular hole bottom, any damage is not had.

Embodiment 2

The present embodiment is the further improvement done on the basis of embodiment 1, and two arc-shaped sides of the expansion-head 7 are most It is big to be smaller than being equal to the external diameter of expansion sleeve 2, it can be made easily to be walked in the hole that can accommodate expansion-head 7, will not be to hole Produce any infringement；Also, the spacing of two parallel edges of the expansion-head 7 is also set to the diameter of dormant bolt 1 by the present embodiment It is identical, then be in order to make when can be more prone to.

The present embodiment is primarily in some special circumstances（The metope for such as installing expansion bolt reserves circular hole aperture just The situation that enough expansion bolts are filled in, or some install and are needed between expansion bolt and reserved circular hole after expansion bolt Situation that gap is filled up etc.）Under still easily can will pull out expansion bolt and easily extract, the work of its operation principle and embodiment 1 is former Reason is identical.

Above-described embodiment is only preferred embodiment of the present utility model, should not be taken to limit protection of the present utility model Scope, as long as body design thought of the present utility model and mentally make have no the change of essential meaning or polishing, its The technical problem solved is still consistent with the utility model, should be included within protection domain of the present utility model.

Claims

1. one kind easily pulls out expansion bolt, including dormant bolt（1）, expansion sleeve（2）, plain washer（3）, spring washer（4）And hexagonal Nut（5）, it is characterised in that the expansion sleeve（2）Afterbody is relatively set with two panels expansion piece（6）, and every expansion piece is vertical Section is that structure is identical and centering angle is less than 90 ° of arc；The dormant bolt（1）Afterbody is provided with an expansion-head（7）, institute State expansion-head longitudinal section edge be in by two relative parallel edges arc-shaped sides relative with two constitute it is run-track shaped；Institute State expansion-head（7）The centering angles of two arc-shaped sides be respectively less than 90 °, and the maximum spacing of two arc-shaped sides is more than expansion sleeve （2）Internal diameter；The expansion-head（7）Two parallel edges be smaller than the minimum spacings of two expansion pieces.

2. one kind according to claim 1 easily pulls out expansion bolt, it is characterised in that the expansion-head（7）Two arcs The maximum on side is smaller than being equal to expansion sleeve external diameter.

3. one kind according to claim 1 or 2 easily pulls out expansion bolt, it is characterised in that the expansion-head（7）It is two parallel The spacing and dormant bolt on side（1）Diameter is identical.