CN202690634U - Expansion screw - Google Patents
Expansion screw Download PDFInfo
- Publication number
- CN202690634U CN202690634U CN 201220360660 CN201220360660U CN202690634U CN 202690634 U CN202690634 U CN 202690634U CN 201220360660 CN201220360660 CN 201220360660 CN 201220360660 U CN201220360660 U CN 201220360660U CN 202690634 U CN202690634 U CN 202690634U
- Authority
- CN
- China
- Prior art keywords
- pull rod
- pull bar
- nut
- expansion
- expansion sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model discloses an expansion screw. The expansion screw comprises an expansion casing, a pull rod and a nut, wherein the pull rod is movably arranged into the expansion casing in a penetrating manner, and the two ends of the pull rod are exposed out of the expansion casting; an external thread is arranged at the head of the pull rod; an external cone is arranged at the tail of the pull rod; the nut is spirally connected to the external thread at the head of the pull rod; and a longitudinal cutting groove is arranged at the rear part of the expansion casing. The expansion screw is characterized in that an axial through hole running through front and back is formed in the centre of the pull rod and is quadrate or hexagonal. The expansion screw disclosed by the utility model is light in weight, saves materials, and well solves the problem due to autorotation of the pull rod and the nut during mounting and dismounting processes, so that the mounting and dismounting processes are simple and labor-saving.
Description
[technical field]
The utility model relates to a kind of improvement and invention of swell fixture.
[background technique]
If an equipment is installed on the wall, generally will use swell fixture.At present, swell fixture common on the market is comprised of expansion sleeve, pull bar and nut usually, at first hole at wall during installation, then expansion sleeve and pull bar are thrown in the wall hole, then the equipment mounting hole is enclosed within the head threads end of pull bar, at the rod head threaded end nut of screwing on, equipment is fixed on the wall at last.Yet; in above-mentioned installation process; often can occur the rotation phenomenon that nut and pull bar rotate simultaneously (because exist screw thread to damage, the situation such as screw thread gets rusty; nut screw or release process in; owing to having larger frictional force between screw thread, so can be easy to occur the rotation phenomenon that nut and pull bar rotate simultaneously), will be fixed by equipment thereby cause nut not tighten smoothly; or nut can not be from whiz on the pull bar, and equipment can not unload.After above-mentioned rotation situation occurring, dealing with can be very difficult, and the installation of equipment, dismounting will become and waste time and energy.The being seen swell fixture of existing market all is to adopt Steel material to make in addition, and the many costs of its consumptive material are high, and Heavy Weight.
[summary of the invention]
For the deficiencies in the prior art, it is a kind of lightweight that the purpose of this utility model is intended to provide, and material is economized, and can solve well the rotation problem of pull bar and nut in installation, the unloading process, makes installation, the unloading process simple labour-saving swell fixture that becomes.
The utility model takes following technological scheme to finish: a kind of swell fixture, comprise expansion sleeve, pull bar and nut, the pull bar activity is through in the expansion sleeve, pull bar two exposes to expansion sleeve, the head of pull bar is provided with outside thread, the afterbody of pull bar is provided with outer cone, described nut is screwed on the outside thread of rod head, the rear portion of described expansion sleeve is provided with vertical grooving, it is characterized in that: the axial hole that connects before and after the center of described pull bar is provided with, described axial hole is square through hole or hexagon through hole.
The swell fixture of technique scheme, at first, the axial hole that connects before and after the center of pull bar is provided with has been saved material so reduced weight; Secondly, axial hole is square through hole or hexagon through hole, the rotation phenomenon that nut and pull bar rotate simultaneously appears in installation, unloading process, can use the instrument with the shape of through holes coupling, extend into and fix pull bar in the through hole pull bar can not be rotated simultaneously with nut, so just solved the rotation problem of nut and pull bar, made installation, unloading process become simply laborsaving.
[description of drawings]
The utility model has following accompanying drawing:
Fig. 1 is structural representation of the present utility model,
Fig. 2 is the A-A view of Fig. 1.
[embodiment]
As shown in the figure, swell fixture of the present utility model, comprise expansion sleeve 3, pull bar 1 and nut 4, pull bar 1 activity is through in the expansion sleeve 3, pull bar 1 two exposes to expansion sleeve 3, the head 1b of pull bar is provided with outside thread, the afterbody 1a of pull bar is provided with outer cone, described nut 4 is screwed on the outside thread of rod head 1b, the rear portion of described expansion sleeve 3 is provided with vertical grooving 3a, the axial hole 2 that connects before and after the center of described pull bar 1 is provided with, and described axial hole 2 is square through hole, certainly, axial hole also can be designed to the hexagon through hole.
Swell fixture of the present utility model because the square or hexagonal axial hole that the center of pull bar connects before and after being provided with, so lightweight material is economized, and efficiently solves the rotation problem of nut and pull bar, makes installation, unloading process become simply laborsaving.
Claims (1)
1. swell fixture, comprise expansion sleeve, pull bar and nut, the pull bar activity is through in the expansion sleeve, pull bar two exposes to expansion sleeve, and the head of pull bar is provided with outside thread, and the afterbody of pull bar is provided with outer cone, described nut is screwed on the outside thread of rod head, the rear portion of described expansion sleeve is provided with vertical grooving, it is characterized in that: the axial hole that connects before and after the center of described pull bar is provided with, described axial hole is square through hole or hexagon through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220360660 CN202690634U (en) | 2012-07-23 | 2012-07-23 | Expansion screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220360660 CN202690634U (en) | 2012-07-23 | 2012-07-23 | Expansion screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202690634U true CN202690634U (en) | 2013-01-23 |
Family
ID=47546260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220360660 Expired - Fee Related CN202690634U (en) | 2012-07-23 | 2012-07-23 | Expansion screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202690634U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105705804A (en) * | 2013-11-06 | 2016-06-22 | 喜利得股份公司 | Expansion anchor with grooves in the expansion cone |
-
2012
- 2012-07-23 CN CN 201220360660 patent/CN202690634U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105705804A (en) * | 2013-11-06 | 2016-06-22 | 喜利得股份公司 | Expansion anchor with grooves in the expansion cone |
| US9869334B2 (en) | 2013-11-06 | 2018-01-16 | Hilti Aktiengesellschaft | Expansion anchor with grooves in the expansion cone |
| CN105705804B (en) * | 2013-11-06 | 2018-09-11 | 喜利得股份公司 | Expansion anchor with the slot in expansion cone |
| US10584731B2 (en) | 2013-11-06 | 2020-03-10 | Hilti Aktiengesellschaft | Expansion anchor with grooves in the expansion cone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130723 |