CN2740828Y

CN2740828Y - Expanding bolt

Info

Publication number: CN2740828Y
Application number: CN 200420080532
Authority: CN
Inventors: 昝明; 赵益华
Original assignee: WUXI XIZHOU MACHINERY CO Ltd
Current assignee: WUXI XIZHOU MACHINERY CO Ltd
Priority date: 2004-10-22
Filing date: 2004-10-22
Publication date: 2005-11-16
Anticipated expiration: 2014-10-22

Abstract

The utility model discloses an expanding bolt which comprises an expanding body, a conical body, a screw rod, a shim plate and a nut, wherein a longitudinal threaded hole is formed on the conical body; one end of the screw rod is screwed in the longitudinal threaded hole from the small end of the screw rod; the shim plate is sheathed on the other end of the screw rod; the nut is screwed on the end of the screw rod on the outer side of the shim plate; the expanding body is composed of an end seat, a plurality of connecting laths and a plurality of expanding pieces; one end of each connecting lath is connected with a rim at the port of the end seat in an equidistant mode; the other end of each connecting lath is respectively and fixedly connected with one end of each expansion piece. The inner surfaces of the expansion pieces are circular arc conical surfaces; the thicknesses of the ends of the expansion pieces connected with the connecting laths are comparatively thin; the expanding pieces are sheathed on the outer face of the conical body via positioning sleeves. A spring of which both ends are respectively abutted with the bottom of the end seat and the big end of the conical body is arranged in the end seat. The expanding bolt has the advantages of large length, high intensity and big bearing traction force. The utility model not only can be used for the decoration of houses or the installation of household electric appliances, but also can be used for the reinforcement or the fixation of mines or tunnels, so the use range of the utility model is not limited.

Description

A kind of EXPANSION ANCHOR BOLTS

(1) technical field

The utility model relates to a kind of fastening piece.Be the EXPANSION ANCHOR BOLTS of inserting the chap of to expand behind petrosal foramen or the porthole specifically, be applicable to that places such as mine, tunnel are as strengthening or fixedly using member.

(2) background technique

At present, the EXPANSION ANCHOR BOLTS of selling on the market mainly is made of basic bar, expansion tube, pad and nut, and basic bar wherein is taper, and its small end is processed with screw thread.Be processed with three longitudinal openings on the one big section of expansion tube one end, make an end of expansion tube be divided into three.During assembling, earlier expansion tube is enclosed within on the basic bar, and makes the big end of its opening one end near basic bar.The small end of base bar stretches out outside the astomous end of expansion tube, pad is enclosed within on this small end, and with the nut location, makes basic bar, expansion tube, pad and nut form one.During use, punch on wall earlier, the diameter in hole and the diameter of EXPANSION ANCHOR BOLTS are about equally.Afterwards, EXPANSION ANCHOR BOLTS is inserted in the porthole by an end of the big end of basic bar, and beaten the small end of basic bar, pad and metope are pressed close to hammer.Then, screw nut with spanner.Along with screwing of nut, basic bar can outwards move, and expansion tube is then because the effect of pad keeps original position motionless.So, along with the outer of basic bar moves, the big end (inner end) of basic bar can progress in expansion tube opening one end and with expansion tube and strut, and then this EXPANSION ANCHOR BOLTS is fixed in the porthole tightly.

Because this EXPANSION ANCHOR BOLTS is to move expansion tube strutted by basic bar outer to realize that it is fixing, this just requires the thickness of expansion tube to approach, and hardness is low.Therefore, the used expansion tube of this EXPANSION ANCHOR BOLTS all is the thin sleeve pipe of aluminium matter.If adopt the higher steel sleeve pipe of hardness, only depend on and screw nut and be difficult to it is strutted.Therefore, the length of this EXPANSION ANCHOR BOLTS is short, intensity pulling force lower, that bear is little, can only be used for house decoration or household electrical appliances and install, and can not be used as strengthening and fixing of mine or tunnel, and using scope is restricted.

In addition, be to progress into to strut in expansion tube opening one end and with expansion tube by the big end (inner end) that makes basic bar to realize owing to this EXPANSION ANCHOR BOLTS is fixed in the porthole.When needing to pull down after the usefulness, basic bar can't be pulled down.Though can be the overhanging end of basic bar is sawed-off by the disc type electric saw, can't make wall return to punching former state before.

(3) summary of the invention

The purpose of this utility model is to provide a kind of EXPANSION ANCHOR BOLTS.This EXPANSION ANCHOR BOLTS, the pulling force that length is long, intensity is high, bear is big, both can be used as the installation of house decoration or household electric appliance, again can be as the reinforcement in mine or tunnel or fixing, using scope is unrestricted.And time spent not, its exposed parts can be pulled down, can make crag or wall return to former state before the punching.

Above-mentioned purpose of the present utility model is realized by following technological scheme:

EXPANSION ANCHOR BOLTS of the present utility model comprises screw rod, nut and backing plate, has center hole, screw rod to insert in this center hole on the backing plate, and nut driving is at an end of screw rod.Its structural feature is also to comprise a taper, and vertical screw is arranged on this taper, and screw rod one end screws in vertical screw from its small end.Some vertical convex tendons are arranged on the taper outer side surface, and its outside also is furnished with expander.Said expander is made up of end seat, some meeting stiles and some intumescent sheets.End seat wherein is the cap shape, and an end of some meeting stiles is on the edge that equidistantly is connected in end seat oral area, their the other end respectively with an end Joint of an intumescent sheet.Between the vertical convex tendon of on the taper outer side surface adjacent two intumescent sheet is arranged all, the circular arc conical surface of the internal surface of this intumescent sheet for ease of cooperating with the taper outer side surface, the join thickness of an end of they and meeting stile is thinner than its other end, they store or non-working condition such as transportation under be enclosed within the outside of taper by hoop by setting sleeve.In the end seat spring is arranged, the two ends of this bullet Huang offset with the big end of holding seat bottom inside face and taper respectively.

Adopt such scheme, have the following advantages:

Because EXPANSION ANCHOR BOLTS of the present utility model contains a taper, and vertical screw is arranged on this taper, an end of screw rod screws in its screw from the small end of taper.Also is furnished with the expander of forming by end seat, some meeting stiles and intumescent sheet in the outside of taper, end seat wherein is the cap shape, one end of some meeting stiles is on the edge that equidistantly is connected in end seat oral area, the other end respectively with an end Joint of an intumescent sheet.Some convex tendons are arranged on the taper outer side surface, between adjacent two vertical convex tendons an intumescent sheet is arranged all, the circular arc conical surface of the internal surface of this intumescent sheet for ease of cooperating with the taper outer side surface, the join thickness of an end of they and meeting stile is thinner than its other end, they store or non-working condition such as transportation under be enclosed within the outside of taper by hoop by setting sleeve.In the end seat spring is arranged, the two ends of this bullet Huang offset with the big end of holding seat bottom inside face and taper respectively.By the expansion tube on the expander replacement conventional expanded body of holding seat, some meeting stiles and intumescent sheet to form.During use, take off setting sleeve,,, some intumescent sheets can be strutted as long as screw nut just several intumescent sheets are free shape.Therefore, the thickness of intumescent sheet can be thickeied arbitrarily as required, and then can improve the intensity of EXPANSION ANCHOR BOLTS, and its pulling force that bears is improved greatly.

Again because EXPANSION ANCHOR BOLTS of the present utility model has replaced basic bar in the conventional expanded bolt by taper and bolt, can be according to the difference of use occasion, select the screw rod of different length, make the length-adjustable of EXPANSION ANCHOR BOLTS, both having can be used for house decoration or household electrical appliances installs, again can be as the reinforcement in mine or tunnel or fixing, using scope is unrestricted.

In addition, because EXPANSION ANCHOR BOLTS of the present utility model has replaced basic bar in the conventional expanded bolt by taper and bolt, when EXPANSION ANCHOR BOLTS of the present utility model with after when needing to pull down, as long as oppositely screw bolt it is separated with taper, and with petrosal foramen or porthole stifled on, can make crag or wall return to former state before the punching.

(4) description of drawings

Fig. 1 is an EXPANSION ANCHOR BOLTS structural representation of the present utility model;

Fig. 2 is an EXPANSION ANCHOR BOLTS exploded view of the present utility model.

(5) embodiment

As shown in Figure 1 and Figure 2, EXPANSION ANCHOR BOLTS of the present utility model is made up of expander, spring 2, taper 4, screw rod 6, backing plate 7 and nut 8.Wherein:

Said expander is made up of end 1, three meeting stile 3 of seat and three intumescent sheets 5.End seat 1 wherein is a cap-like structure, and an end of three meeting stiles 3 is on the edge that equidistantly is welded on its oral area, and they are paralleled with the sidewall of end seat 1.The circular arc conical surface of the inner side surface of intumescent sheet 5 for ease of matching with taper 4 makes that the one end is thick, an end thin.The other end of three meeting stiles 3 welds mutually with the thin end of an intumescent sheet 5 respectively.

Said taper 4 is between the intumescent sheet 5, and spring 2 is in the end seat 1, and its two ends offset with the internal surface of end seat 1 bottom and the big end of taper 4 respectively.Being evenly equipped with 12, three intumescent sheets 5 of three vertical convex tendons on the outer side surface of taper 4 is in respectively between adjacent two vertical convex tendons 12.The outside hoop of intumescent sheet 5 is with setting sleeve 10, so that EXPANSION ANCHOR BOLTS of the present utility model is enclosed within three intumescent sheets, 5 hoops on the taper 4 by setting sleeve 10 under non-working conditions such as storage or transportation, expander and spring 2, the taper 4 be made up of end seat 1, meeting stile 3 and intumescent sheet 5 is formed as one.

The outer side surface circumferencial direction of said intumescent sheet 5 is processed with awl dentation groove, so that make the outer side surface of intumescent sheet 5 form roughened surface.

Be processed with vertical screw on the taper 4, the diameter of the diameter of this screw and screw rod 6 adapts, and an end of screw rod 6 is that small end screws in the screw on it from the outer end of taper 4.Said backing plate 7 is enclosed within on the other end of screw rod 6.Screw rod 6 ends in backing plate 7 outsides are rotary with nut 8.It vertically is processed with elongated cutting face 11 screw rod 6 outer side surface upper edges wherein, is processed to straight flange with this cutting face corresponding backing plate 7 center holes one side, so that the two cannot not be rotatable the shape secure fit in a circumferential direction.

EXPANSION ANCHOR BOLTS of the present utility model is accomplished fluently deep hole earlier in use on crag (or wall) 9, and will lean on EXPANSION ANCHOR BOLTS one end of expander to insert in the deep hole.When inserting, setting sleeve 10 can come off automatically.Then, continue firmly inwardly to push away screw rod 6, exert pressure for spring 2, will shift the bottom of deep hole onto by the expander that end seat 1, meeting stile 3 and intumescent sheet 5 are formed by taper 4.Postpone in stopping screw rod 6 carried out, taper 4 can outwards move under the resilient force of spring 2, thereby three intumescent sheets 5 are strutted automatically.Screw nut 8 at last again, along with screwing of nut 8, taper 4 can move and moves outward with screw rod 6 outer, and then three intumescent sheets 5 are continued to strut, and EXPANSION ANCHOR BOLTS of the present utility model tightly is stuck in the deep hole on the crag (or wall) 9.

Claims

1. an EXPANSION ANCHOR BOLTS comprises screw rod (6), nut (8) and backing plate (7), and backing plate has center hole on (7), and screw rod (6) inserts in this center hole, and nut (8) is screwed in an end of screw rod (6); It is characterized in that also comprising a taper (4), vertical screw is arranged on this taper, screw rod (6) one ends screw in vertical screw from its small end; On taper (4) outer side surface some vertical convex tendons (12) are arranged, its outside also is furnished with expander; Said expander is made up of end seat (1), some meeting stiles (3) and some intumescent sheets (5); End seat (1) wherein is the cap shape, and an end of some meeting stiles (3) is on the edge that equidistantly is connected in end seat (1) oral area, their the other end respectively with an end Joint of an intumescent sheet (5); Between adjacent two vertical convex tendons (12) on taper (4) outer side surface intumescent sheet (5) is arranged all, the circular arc conical surface of the internal surface of this intumescent sheet for ease of cooperating with taper (4) outer side surface, the join thickness of an end of they and meeting stile (3) is thinner than its other end, they store or non-working condition such as transportation under bound round the outside that is enclosed within taper (4) by setting sleeve (10); In the end seat (1) spring (2) is arranged, the two ends of this bullet Huang offset with the big end of holding seat (1) bottom inside face and taper (4) respectively.

2. EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that being fixed the cooperation in a circumferential direction between the center hole of screw rod (6) and backing plate (7).

3. EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that the vertical convex tendon (12) on taper (4) outer side surface is three.

4. according to claim 1,2 or 3 described EXPANSION ANCHOR BOLTS, it is characterized in that being roughened surface on the outer side surface of said intumescent sheet (5).

5. according to claim 1,2 or 3 described EXPANSION ANCHOR BOLTS, it is characterized in that on the outer side surface circumferencial direction of intumescent sheet (5) the zigzag fashion groove being arranged.