CN202991759U - Locking detachable expansion screw - Google Patents
Locking detachable expansion screw Download PDFInfo
- Publication number
- CN202991759U CN202991759U CN 201220563016 CN201220563016U CN202991759U CN 202991759 U CN202991759 U CN 202991759U CN 201220563016 CN201220563016 CN 201220563016 CN 201220563016 U CN201220563016 U CN 201220563016U CN 202991759 U CN202991759 U CN 202991759U
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- CN
- China
- Prior art keywords
- expansion
- screw rod
- shell
- screw
- expansive force
- 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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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
A locking detachable expansion screw adopts the technical scheme that symmetrical notches are arranged at the top end of an expansion casing. The notches are used for placing an expansion casing fixing wrench during installing and detaching and preventing the expansion casing from rotating. An expansion inclined hole is arranged in the lower end of the middle of the expansion casing, a plurality of puncturing expansion grooves are arranged on the periphery of the lower end of the middle of the expansion casing, and inner threads are tapered inside the upper end of the middle of the expansion casing. The locking detachable expansion screw is characterized in that outer threads are arranged outside an expansive force installing screw, and a square core (or a hexagonal hole or a straight-line-shaped groove and the like) is arranged at the top end of the expansion force installing screw and used for screwing up or screwing off an expansion force installing rod. The other end of the expansion force installing screw is of a circular structure and is used for ejecting open or loosening the expansion inclined hole, the lower end of the expansion casing is enlarged or reduced, and a purpose of locking and detaching an expansion rod is achieved. An installing nut is arranged on the expansion force installing screw and used for fixing a device or an electric appliance.
Description
Technical field
The utility model relates to various expansive screws, particularly a kind of locking disassembly-type expansive screw.
Background technique
With expansive screw, install or fixing equipment and the household electric appliance under-chassis that does not pre-determine position, it is a kind of installation method of simple and fast, the known expansive screw of currently available technology is divided into two large classes, a kind of is iron-clad screw rod cable-stayed type expansion rod, another kind is that nylon outer shell is directly attacked the formula expansion rod, above-mentioned iron-clad screw rod cable-stayed type expansion rod and nylon outer shell are directly attacked the formula expansion rod, fastening nut there will be the phenomenon that screw rod and expansion rod rotate when mounted, screw rod and expansion rod rotate the under-chassis of equipment and household electric appliance can't be fixed, this mainly contains two reasons and causes, 1: be that the too large and expansion shell of mounting hole does not closely cooperate, 2: be that screw rod bottom circle acutance is large not, the method that the installer will solve these two problems is packing between expansion shell and mounting hole, the shell that makes to expand can not rotate, reach the purpose of energy fastening nut, but this is affected to equipment and electric mounting intensity, especially to the installation strength equipment that has certain requirements, iron-clad screw rod cable-stayed type expansion rod and nylon outer shell are directly attacked the formula expansion rod, can't meet the installation strength requirement especially, large defect is that these two kinds of expansion rods are when equipment and electrical equipment displacement again, can not take out and reuse from mounting hole, it is also a kind of wasting of resources.
Summary of the invention
Technical problem to be solved in the utility model is, overcome current iron-clad screw rod cable-stayed type expansion rod, nylon outer shell and directly attack the technical problem that the formula expansion rod exists, provide a kind of expansion shell and mounting hole to lock, can pull out reusable locking disassembly-type expansive screw from the mounting hole dismounting again.
In order to realize expanding, shell can be locked with mounting hole, can pull out the purpose reused from the mounting hole dismounting again, the technological scheme of locking disassembly-type expansive screw of the present utility model comprises the expansion shell, expansive force is installed screw rod, expansion shell top has symmetric windows, the effect of breach is to lay when mounted the expansion shell back-up wrench shell that prevents from expanding to rotate, in the middle of the expansion shell, the inside, lower end is the expansion inclined hole, middle lower end surrounding has many punching expansion slots, in the middle of the expansion shell, internal thread has been attacked in the inside, upper end, be further characterized in that it is outside thread that expansive force is installed the screw rod outside, it is Fang Xin (or inner hexagonal hole or straight groove etc.) that expansive force is installed screw tip, be used for tightening or unscrew the expansive force mounting rod, it is round-shaped structure that expansive force is installed the screw rod the other end, be used for backing down or loosen the expansion inclined hole and make to expand the change of shell lower end greatly or diminish, mounting nuts is used for fixing equipment or electrical equipment above being arranged on expansive force installation screw rod.
The working principle of the utility model installing/dismounting is such: when equipment and household electrical appliances need to be installed in certain position, electricity consumption is drilled on the hard basis gets the mounting hole that can put into locking disassembly-type expansive screw shell, then put into a cover locking disassembly-type expansive screw, the breach of aiming at expansion shell upper end with expansion shell back-up wrench maintains static shell, tighten expansive force screw rod is installed, (because of expansive force, the screw rod outside being installed is screw thread, internal thread is attacked in the inside, expansion shell upper end) expansive force installation screw rod lower end toward the expansion shell under the effect of internal and external threads is moved, when the front end of screw rod being installed when expansive force pushes up in the expansion shell lower end expansion inclined hole, because expansion inclined hole in lower end in the middle of the expansion shell is small top and big bottom special construction and has many punching expansion slots, under the effect of the reaction force when expansive force is installed screw rod and moved toward lower end in the expansion shell, making to expand, the shell lower end becomes greatly gradually and mounting hole closely cooperates, reach expansion shell and mounting hole locking, and the purpose of certain installation strength arranged.
When equipment and electrical equipment need to be shifted, unscrew mounting nuts and remove equipment or electrical equipment, the breach of aiming at expansion shell upper end with the expansion shell back-up wrench shell that makes to expand maintains static, unscrew expansive force screw rod is installed, make expansive force installation screw front end and expansion inclined hole lose reaction force, make mounting hole and expansion shell lose expansive force, when expansive force installation screw rod is unscrewed to the position more than the expansion inclined hole, pull expansive force that screw rod is installed and just can pull out and reach the reusable purpose of energy together with the expansion shell.
The accompanying drawing explanation
Fig. 1 is the utility model example structure sectional view;
Fig. 2 is the utility model STRUCTURE DECOMPOSITION figure;
Fig. 3 is that the utility model embodiment installs locking figure;
Fig. 4 is the utility model embodiment dismounting figure;
[0008]referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model locking disassembly-type expansive screw comprises expansion shell 2, expansive force is installed screw rod 8, expansion shell 2 tops have symmetric windows 5, the effect of breach 5 is to lay expansion shell back-up wrench 10 when installing/dismounting, the shell 2 that prevents from expanding rotates, in the middle of expansion shell 2, the inside, lower end is expansion inclined hole 1, middle lower end surrounding has many punching expansion slots 3, in the middle of expansion shell 2, internal thread 4 has been attacked in the inside, upper end, it is outside threads 6 that expansive force is installed screw rod 8 outsides, expansive force is installed screw rod 8 side of being, top core 9(or inner hexagonal hole or straight groovees etc.), be used for tightening or unscrew expansive force screw rod 8 is installed, it is round-shaped structures that expansive force is installed screw rod 8 the other ends, be used for backing down or loosen expansion inclined hole 1, shell 2 lower ends that make to expand become large or diminish, mounting nuts 7 is used for fixing equipment or electrical equipment above being contained in expansive force installation screw rod 8, 11 is the hard basis.
Claims (1)
1. lock the disassembly-type expansive screw, comprise expansion shell (2), expansive force is installed screw rod (8), expansion shell (2) top has symmetric windows (5), the effect of breach (5) is by putting expansion shell back-up wrench (10) when installing/dismounting, the shell (2) that prevents from expanding rotates, in the middle of expansion shell (2), the inside, lower end is expansion inclined hole (1), middle lower end surrounding has many punching expansion slots 3, in the middle of expansion shell (2), internal thread (4) has been attacked in the inside, upper end, it is outside thread (6) that expansive force is installed screw rod (8) outside, it is Fang Xin (9) that expansive force is installed screw rod (8) top, be used for tightening or unscrew expansive force screw rod (8) is installed, it is round-shaped structure that expansive force is installed screw rod (8) the other end, be used for backing down or loosen expansion inclined hole (1), shell (2) lower end that makes to expand becomes large or diminishes, reach the purpose of expansive screw locking dismounting, mounting nuts (7) is used for fixing equipment or electrical equipment above being contained in expansive force installation screw rod (8), (11) be the hard basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220563016 CN202991759U (en) | 2012-10-30 | 2012-10-30 | Locking detachable expansion screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220563016 CN202991759U (en) | 2012-10-30 | 2012-10-30 | Locking detachable expansion screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202991759U true CN202991759U (en) | 2013-06-12 |
Family
ID=48562943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220563016 Expired - Fee Related CN202991759U (en) | 2012-10-30 | 2012-10-30 | Locking detachable expansion screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202991759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969014A (en) * | 2017-04-10 | 2017-07-21 | 贵州省剑河民族中学 | A kind of setscrew of reusable edible |
-
2012
- 2012-10-30 CN CN 201220563016 patent/CN202991759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969014A (en) * | 2017-04-10 | 2017-07-21 | 贵州省剑河民族中学 | A kind of setscrew of reusable edible |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20141030 |
|
| EXPY | Termination of patent right or utility model |