CN202082226U

CN202082226U - Detachable expansion screw

Info

Publication number: CN202082226U
Application number: CN2011201908858U
Authority: CN
Inventors: 朱福生
Original assignee: Kunming Iron and Steel Group Co Ltd
Current assignee: Yuxi Dahongshan Mining Co Ltd
Priority date: 2011-06-08
Filing date: 2011-06-08
Publication date: 2011-12-21
Anticipated expiration: 2021-06-08

Abstract

The utility model provides a detachable expansion screw, which includes an expansion sleeve, a screw stem arranged in the expansion sleeve and provided with a head at an end part, and a screw nut arranged on the screw stem. The detachable expansion screw is characterized in that an axial groove is arranged on the stem surface of the screw stem, and pull rods with hooks at two ends are arranged in the groove and the placed in a hole of the screw nut; and the hook at one end of the pull rod is arranged outside the screw nut and placed in a corresponding through hole on the expansion sleeve, while the hook at the other end of the pull rod is arranged outside the screw nut and extends out of the screw stem. The expansion screw can be conveniently retracted from a hole on a wall, and is very easy to retract; all that is needed is to rotate the screw nut on the screw stem, then the expansion sleeve can be driven by the pull rod and the hooks on the pull rod to have displacement and be separated from the head of the screw stem easily, and the whole expansion screw can change into small diameter under the elastic action of the expansion sleeve and further be detached from the hole on the wall. The detachable expansion screw is simple to process, the cost is low, and the detachment and the installation are convenient.

Description

A kind of dismountable EXPANSION ANCHOR BOLTS

Technical field

The utility model relates to a kind of EXPANSION ANCHOR BOLTS, and particularly a kind of dismountable EXPANSION ANCHOR BOLTS belongs to construction and installation and uses parts design and manufacturing technology field.

Background technique

EXPANSION ANCHOR BOLTS is that building and finishing field must the obligato fixing parts of using, it places expansion piece in the hole of body of wall or other object correspondences, again bolt is threaded onto in the expansion piece, supports, be hung on metope, floor or the post beam so that will build and fit up object by bolt.Make expansion piece in hole intramedullary expansion and card jail because EXPANSION ANCHOR BOLTS is the screw-in by bolt, therefore, traditional expansion bolt be a disposable parts all, in case insert in the hole and by the bolt expansion and fixing after, just be difficult to taking-up again.When the position of EXPANSION ANCHOR BOLTS need be adjusted, just can only abandon putting in addition, EXPANSION ANCHOR BOLTS could be taken out otherwise will destroy stationary plane, not only time-consuming, and take a lot of work, take material.At present the dismountable expansion bolt that occurs on the market is again because its processing, complex forming technology, and causes the EXPANSION ANCHOR BOLTS cost to increase, and costs an arm and a leg, and is difficult to accept for people.Therefore be necessary prior art is improved.

Summary of the invention

Mostly be disposable appliance greatly for solving existing EXPANSION ANCHOR BOLTS, and bring time-consuming, take a lot of work, take material, and problems such as the cost that exists of dismountable expansion bolt, price height, the utility model provides a kind of dismountable EXPANSION ANCHOR BOLTS.

The utility model is finished by following technical proposal: a kind of dismountable EXPANSION ANCHOR BOLTS, comprise expansion sleeve, place the screw rod of its end strap bolt head in the expansion sleeve, be located at the nut on the screw rod, it is characterized in that the screw rod pole face is provided with axial notch, be provided with the pull bar of two ends buckle in the groove, and pull bar is positioned at the hole of nut, the hook of pull bar one end is positioned at outside the nut and places through hole corresponding on the expansion sleeve, the hook of the pull bar the other end is positioned at outside the nut and stretches out outside the screw rod, in the time of need withdrawing from the wall hole with convenient EXPANSION ANCHOR BOLTS, only need swivel nut and drive the pull bar displacement, again by the moving expansion sleeve displacement of the hook strip on the pull bar, thereby make expansion sleeve break away from screw rod bolt head and keep spacing, whole EXPANSION ANCHOR BOLTS is deviate from from the wall hole with the wall hole.

The bolt head of described screw rod comprises the ball ring of end, is positioned at the conical section of ball ring one side, to reduce the friction of bolt head and expansion sleeve, promptly is convenient to screw rod and enters and expansion sleeve is strutted, and is convenient to the bolt head of expansion sleeve disengaging screw rod end again.

The afterbody of described screw rod is made as cylinder, perhaps is made as the cylinder of tail end band drag hook, conveniently to withdraw from.

The groove depth of the axial notch afterbody on the described screw rod pole face is greater than the groove depth at middle part, so that nut when retreating to screw rod tail, is depressed in the deep trouth hook of tie rod end, thereby makes nut break away from screw rod.

The utlity model has following advantage and effect: adopt such scheme, can easily EXPANSION ANCHOR BOLTS be withdrawed from from the wall hole, and it is comparatively simple to withdraw from operation, only need the nut on the rotary screw, can by pull bar and on the moving expansion sleeve displacement of hook strip, and break away from screw rod bolt head easily, and under the elastic reaction of expansion sleeve, become path, and then whole EXPANSION ANCHOR BOLTS is deviate from from the wall hole.The utility model machine shaping is simple, and cost is low, and disassemble or assemble are convenient, and time saving and energy saving.Be a desirable dismountable EXPANSION ANCHOR BOLTS in fact.

Description of drawings

Fig. 1 is the expansion structure schematic representation of the utility model;

Fig. 2 is another structural representation of screw rod;

Fig. 3 is the A-A view of Fig. 1;

Fig. 4 is the not expansion structure schematic representation of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

Dismountable EXPANSION ANCHOR BOLTS that the utility model provides, comprise expansion sleeve 5, these expansion sleeve 5 bottoms are cylinder, top be trough of belt 15 strut post 6, as Fig. 3, also comprise its end strap bolt head 7 that places in the

expansion sleeve

5,8 screw rod 9, be located at the nut 12 on the screw rod 9, wherein screw rod 9 pole faces are provided with axial notch 10, be provided with two ends buckle 3 in the

groove

10,2 pull bar 11, pull bar 11 is positioned at the hole of nut 12, the hook 3 of pull bar 11 upper ends is positioned at the top outside the nut 12, hook 3 places in the through hole 4 corresponding on the expansion sleeve 5, the hook 2 of pull bar 11 lower ends is positioned at the below outside the nut 12, hook 2 stretches out outside the screw rod 9, the bolt head of screw rod 9 comprises the ball ring 7 of end, be positioned at the conical section 8 of ball ring 7 downsides, the afterbody of screw rod 9 is made as cylinder 13, as Fig. 1, perhaps is made as the cylinder 13 of tail end band drag hook 14, as Fig. 2, conveniently withdrawing from, the groove depth 1 of axial notch 10 bottoms on screw rod 9 pole faces is greater than the groove depth 10 at middle part, so that nut 12 is when retreating to the afterbody of screw rod 9, the hook 2 of pull bar 11 lower ends is depressed in the deep trouth 1, thereby makes nut 12 break away from screw rod 9.

When entering the wall hole, the

bolt head

7,8 of screw rod 9 is introduced into, screw rod 9 together enters in the wall hole together with expansion sleeve 5 afterwards, as Fig. 4, being rotated in the forward nut 12 after putting in place makes screw rod 9 be displaced downwardly to

bolt head

7,8 to enter strutting in the post 6 of expansion sleeve 5, thereby will strut after post 6 struts, and be about to EXPANSION ANCHOR BOLTS and be fixed in the wall hole, as Fig. 1; Counterrotating nut 12 when withdrawing from makes pull bar 11 drive expansion sleeve 5 and strut post 6 and is displaced downwardly to

bolt head

7,8 belows thereupon, then struts post 6 and become path under elastic reaction, as Fig. 4, thereby whole EXPANSION ANCHOR BOLTS can be withdrawed from from the wall hole.

Claims

1. dismountable EXPANSION ANCHOR BOLTS, comprise expansion sleeve, place the screw rod of its end strap bolt head in the expansion sleeve, be located at the nut on the screw rod, it is characterized in that the screw rod pole face is provided with axial notch, be provided with the pull bar of two ends buckle in the groove, and pull bar is positioned at the hole of nut, the hook of pull bar one end is positioned at outside the nut and places through hole corresponding on the expansion sleeve, and the hook of the pull bar the other end is positioned at outside the nut and stretches out outside the screw rod.

2. dismountable EXPANSION ANCHOR BOLTS according to claim 1, the bolt head that it is characterized in that described screw rod comprises the ball ring of end, is positioned at the conical section of ball ring one side.

3. dismountable EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that the afterbody of described screw rod is made as cylinder, perhaps is made as the cylinder of tail end band drag hook.

4. dismountable EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that the groove depth of the groove depth of the axial notch afterbody on the described screw rod pole face greater than the middle part.