CN200989353Y

CN200989353Y - Conveniently mountable and dismoutable expansion nut bolt

Info

Publication number: CN200989353Y
Application number: CN 200620141816
Authority: CN
Inventors: 何拥军
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2007-12-12
Anticipated expiration: 2016-12-29

Abstract

The utility model relates to a easy-to-disassemble expansion bolt, an expansion bolt used to hang of fix objects on the wall and consists of a screw with a reverse cone at one side and a screw thread section at the other side, an expansion sleeve with a loop positioned on the screw and a groove for inflation of the expansion sleeve, a nut positioned and rotated in the screw thread section to expand the expansion sleeve, and a gasket arranged between the expansion sleeve and the nut. The expansion bolt is characterized in that the outer end wall of the reverse cone is provided with protuberant blocks capable of embedding in the groove. The number of the protuberant blocks is equal to that of the grooves. The length of the screw thread section of the screw is greater than the sum of the length of the reverse cone and the length of the groove. The utility model solves the problem that the prior expansion bolt is not easy to be dismantled out of the wall body, and has the advantages that the disassembly of the easy-to-disassemble expansion bolt has no damage to the wall body, the expansion bolt can be repeatedly used, the other processing equipment and mould can be remained with an exception to the small modification of the existing mould, hereby beneficial to the update of the prior expansion bolt.

Description

Easily-detachable swell fixture

Technical field

The utility model relates to a kind of be used for suspension or mounting article on body of wall, as the easily-detachable swell fixture of indoor machine of air-conditioner, outdoor unit etc.

Background technique

Existing swell fixture can be seen from Fig. 5 and Fig. 6, it comprises that an one end has the screw rod 1 of inverted cone 1a, other the end section of being threaded 1b, kink is at the expansion sleeve 2 that has the notch 2a that can swell for its distortion on the screw rod and on it, the nut 3 that can in it rotates, expansion sleeve be expanded on inverted cone that is contained on the screw flight section 1b, and the packing ring between expansion sleeve and nut 4.In use, earlier the slotted hole that the diameter and the length of one of cutter and expansion sleeve is complementary on body of wall is put into swell fixture then, and is rotated the nut 3 on it again in slotted hole; The instant pushing tow expansion sleeve of the rotation of nut is moved to the left, and when expansion sleeve touched the inverted cone 1a of screw rod, the notch place section of expansion sleeve began expansion, and constantly expanded along with the left lateral of expansion sleeve, and is fastening in body of wall until swell fixture.Existing swell fixture also has following shortcoming: though it can be on body of wall secure fixation, for the relieved use of people, when people do not need with it, just it can not unloaded, unless its revealed section is amputated; Otherwise the screw rod revealed section of swell fixture just continues to be deposited on the body of wall, has both made the body of wall out-of-flatness clean and tidy, again for fear of people's daily action.

Summary of the invention

The utility model is to overcome existing shortcoming in the above-mentioned prior art, and a kind of easily-detachable swell fixture is provided, and makes it have the body of wall around dismounting the time does not destroy it, the swell fixture that unloads characteristics such as to reuse.

The easily-detachable swell fixture of the utility model, it comprises that an one end has inverted cone, hold the screw rod of the section of being threaded in addition, kink is at the expansion sleeve that has the notch that can swell for its distortion on the screw rod and on it, one is contained on the screw flight section and the nut that can in it rotates expansion sleeve be dilated, and the packing ring between expansion sleeve and nut, it is characterized in that: have the projection that can embed in the notch on the end outer wall of its inverted cone, the quantity of projection equates with notch quantity on the expansion sleeve, and the length of screw flight section is greater than the length of inverted cone and the length sum of notch.

Above-mentioned easily-detachable swell fixture, the quantity of the notch on its expansion sleeve are three or four; And the packing ring between expansion sleeve and nut is an elastic washer; So that the utility model swell fixture fixing more firm on body of wall.

The beneficial effects of the utility model: after 1) the utility model is provided with projection on the inverted cone end wall, swell fixture can be fastened on the body of wall, and mouth can also draw off swell fixture by swivel nut when needed from the slotted hole of body of wall; And whole unloading process is a swivel nut, so without detriment to body of wall and screw, body of wall can be restored immediately and this swell fixture can be reused; 2) material that projection consumed on the screw rod is few, and when making screw rod, need only do following little modification at existing mould: in the mould in inverted cone, set out corresponding and its shape and the size indent identical with evagination get final product, and need not discard original mould with the notch position of expansion sleeve; Therefore when producing the easily-detachable swell fixture of the utility model, still can use existing process equipment, and minimum, so help renewal to existing swell fixture to the influence of cost.

Description of drawings

Fig. 1 and Fig. 3 are respectively the main sectional view and the left views of the easily-detachable swell fixture of the utility model;

Fig. 2 and Fig. 4 are respectively B-B sectional drawing and the A-A sectional views among Fig. 1;

Fig. 5 and Fig. 6 are the structural drawing of existing swell fixture, and wherein Fig. 5 is its main sectional view, and Fig. 6 is the C-C sectional drawing among Fig. 5.

Label declaration among the figure: 1-screw rod; The 1a-inverted cone; The 1b-thread section; The 1c-projection; The 2-expansion sleeve; Notch on the 2a-expansion sleeve; The 3-nut; The 4-packing ring; L ₁The length of inverted cone 1a on the-screw rod; The width of m-projection; The width of M-notch 2a; L ₃The length of thread section 1b on the-screw rod; L ₂The length of-notch 2a; L ₃The length of-thread section 1b.

Embodiment

The easily-detachable swell fixture of present embodiment, its structure can be seen from Fig. 1～Fig. 4, it comprises the screw rod 1 that an one end has inverted cone 1a, other the end section of being threaded 1b, kink has the expansion sleeve 2 of the notch 2a that can swell for its distortion on screw rod 1 and on it, one is contained in the nut 3 that screw flight section 1b goes up and expansion sleeve 2 is dilated, and the packing ring 4 between expansion sleeve 2 and nut 3; Have projection 1c on the end outer wall of the inverted cone in the present embodiment, the height that this projection directly makes progress in inverted cone and the external diameter of expansion sleeve are complementary, both sizes can equate, the perhaps size of apparent expansion screw, the height that makes projection slightly than the external diameter of expansion sleeve bigger or smaller; And the width m of this projection equates with notch quantity on the expansion sleeve less than the quantity of the width M of notch 2a, projection; The length L of screw flight section 1b ₃Length L greater than inverted cone 1a ₁Length L with notch 2a ₂Sum.

The width m of above-mentioned projection equates with notch quantity on the expansion sleeve less than the quantity of the width M of notch 2a and projection, to make things convenient for swell fixture projection can be embedded in the notch easily.

The length L of the thread section 1b of above-mentioned screw rod 1 ₃Length L greater than inverted cone 1a ₁Length L with notch 2a ₂Sum is the length L that makes the thread section 1b of screw rod 1 ₃Can guarantee that screw rod 1 can withdraw from when the dismounting swell fixture from body of wall.

Notch 2a quantity on the above-mentioned expansion sleeve 2 is desirable a plurality of, preferably gets three or four, to strengthen its stability in use.And notch 2a quantity equates with the quantity of projection 1c.Be taken as three in the present embodiment.

The easily-detachable swell fixture of present embodiment is when packing body of wall into, its using method is identical with existing swell fixture, promptly the slotted hole that earlier diameter and the length of one of cutter and expansion sleeve is complementary on body of wall is put into swell fixture then, and is rotated the nut 3 on it in slotted hole; As shown in fig. 1, the rotation of nut moves right screw rod, and when the inverted cone 1a of screw rod touched expansion sleeve, the notch of expansion sleeve began expansion, and the constantly expansion along with moving to right of screw rod, and is fastening in body of wall until swell fixture; With the difference of existing swell fixture be: before swell fixture is put into slotted hole, earlier projection 1c is put into the notch 2a of expansion sleeve.

If the swell fixture of present embodiment is removed, then unscrew nut 3 earlier, rap the overhanging end of screw rod, from notch so that projection withdraws from; After this little again commentaries on classics screw rod, make the projection 1c notch 2a that staggers, (this cushion block can be an instrument to place cushion block then between wall outer wall and nut, as vice, wrench and so on) rotating nut again, this moment expansion sleeve 2 can be under the promotion of projection along with screw rod 1 together to the right, and constantly overhanging from the slotted hole of body of wall, until taking-up.Therefore the utility model swell fixture can be guaranteed the using effect identical with existing swell fixture, can easily it be shed from body of wall without it the time again.In whole unloading process,, make the present embodiment swell fixture reusable, and also make things convenient for the recovery of body of wall because of only needing swivel nut without detriment to body of wall and swell fixture.

Claims

1, a kind of easily-detachable swell fixture, it comprises that an one end has inverted cone (1a), hold the screw rod (1) of the section of being threaded (1b) in addition, kink goes up and has on it expansion sleeve (2) of the notch (2a) that can swell for its distortion at screw rod (1), one is contained in the nut (3) that screw flight section (1b) goes up and can in it rotates expansion sleeve (2) be dilated, and the packing ring between expansion sleeve and nut (4), it is characterized in that: have the projection (1c) that can embed in the notch on the end outer wall of its inverted cone, the quantity of projection equates with notch quantity on the expansion sleeve, and the length (L of screw flight section (1b) ₃) greater than the length (L of inverted cone (1a) ₁) with the length (L of notch (2a) ₂)) sum.

2, easily-detachable swell fixture according to claim 1 is characterized in that: the quantity of the notch (2a) on the said expansion sleeve (2) is three or four.