CN203051409U - Double-thread bolt - Google Patents
Double-thread bolt Download PDFInfo
- Publication number
- CN203051409U CN203051409U CN 201320037784 CN201320037784U CN203051409U CN 203051409 U CN203051409 U CN 203051409U CN 201320037784 CN201320037784 CN 201320037784 CN 201320037784 U CN201320037784 U CN 201320037784U CN 203051409 U CN203051409 U CN 203051409U
- Authority
- CN
- China
- Prior art keywords
- thread portion
- bolt
- screw
- helical thread
- tail
- 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 - Lifetime
Links
Images
Landscapes
- Connection Of Plates (AREA)
Abstract
The utility model provides a double-thread bolt. The double-thread bolt comprises a bolt head and a bolt tail, wherein the bolt tail comprises an upper thread portion, a middle portion and a lower thread portion, external threads are formed on the upper thread portion and the lower thread portion, and the middle portion is located between the upper thread portion and the lower thread portion. As the double-thread bolt is provided with the upper thread portion and the lower thread portion, when the bolt breaks away from the thread portion of a terminal box, the upper thread portion of the bolt is still meshed with a tail cover; and at the moment, the tail cover drives the bolt to be turned, and the terminal box is prevented from being buckled by the bolt. The middle unthreaded portion has special functions. Namely, when the upper thread portion of the bolt breaks away from the tail cover, the tail cover is opened, and the double-thread bolt makes turning space automatically and cannot be in the way.
Description
Technical field
The utility model belongs to the link field, is specifically related to a kind of dual threaded screw.
Background technique
Ammeter generally comprises drain pan, loam cake and tail-hood, and tail-hood is connected by hinge is turnover with loam cake, and loam cake and tail-hood be located on the drain pan; Fixedly connected by screw between tail-hood and the drain pan.When calibration, the employee of power office need use electric screw driver to open screw on the tail-hood successively, opens tail-hood afterwards and carries out calibration.But after opening screw, screw occurs through regular meeting and fasten the situation that end is turned round the helical thread portion of box because of carelessness again, make tail-hood to open, thereby increased employee's additional workload.
The model utility content
The utility model provides a kind of screw of avoiding to fasten the dual threaded screw that end is turned round box at above-mentioned the deficiencies in the prior art.
The utility model is achieved by the following technical solution:
A kind of dual threaded screw, comprise screw head and screw afterbody, it is characterized in that described screw afterbody comprises helical thread portion, intermediate portion and following helical thread portion, last helical thread portion and following helical thread portion all form outside thread, and intermediate portion is between last helical thread portion and following helical thread portion.
Further setting of the present utility model is that described intermediate portion is cylindric.
Further setting of the present utility model is that described screw head is provided with cross recess or straight groove.
Further setting of the present utility model is that described screw head is provided with a lead seal hole.
Dual threaded screw described in the utility model has two helical thread portions up and down, and when screw disengaging end was turned round the box helical thread portion, the last helical thread portion of screw was also meshing with tail-hood; At this moment, tail-hood drives the screw upset, can avoid screw to fasten end and turn round box.Middle unthreaded portion has special role, namely when the top of screw screw thread and tail-hood disengagement, opens tail-hood, and dual threaded screw is abdicated the upset space automatically, can not be in the way.
Description of drawings
Fig. 1 is the structural drawing of dual threaded screw described in the utility model;
Among the figure: screw head 1, last helical thread portion 2, intermediate portion 3, following helical thread portion 4, lead seal hole 5.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model provides a kind of dual threaded screw, comprise screw head 1 and screw afterbody, described screw afterbody comprises helical thread portion 2, intermediate portion 3 and following helical thread portion 4, last helical thread portion 2 and following helical thread portion 4 all form outside thread, and intermediate portion 3 is between last helical thread portion 2 and following helical thread portion 4.Described intermediate portion is cylindric.Described screw head 1 is provided with cross recess or straight groove.On the described screw head 1 lead seal hole 5 can also be set.
The above is preferred embodiment of the present utility model, and all equivalent variations of doing according to the utility model claim all should belong to protection domain of the present utility model.
Claims (4)
1. dual threaded screw, comprise screw head and screw afterbody, it is characterized in that described screw afterbody comprises helical thread portion, intermediate portion and following helical thread portion, last helical thread portion and following helical thread portion all form outside thread, and intermediate portion is between last helical thread portion and following helical thread portion.
2. dual threaded screw according to claim 1 is characterized in that, described intermediate portion is cylindric.
3. dual threaded screw according to claim 1 is characterized in that, described screw head is provided with cross recess or straight groove.
4. dual threaded screw according to claim 1 is characterized in that, described screw head is provided with a lead seal hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320037784 CN203051409U (en) | 2013-01-23 | 2013-01-23 | Double-thread bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320037784 CN203051409U (en) | 2013-01-23 | 2013-01-23 | Double-thread bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051409U true CN203051409U (en) | 2013-07-10 |
Family
ID=48734367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320037784 Expired - Lifetime CN203051409U (en) | 2013-01-23 | 2013-01-23 | Double-thread bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051409U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465126A (en) * | 2016-01-05 | 2016-04-06 | 昆山恩都照明有限公司 | Connecting structure capable of preventing screw from falling off |
| TWI829553B (en) * | 2023-03-10 | 2024-01-11 | 英業達股份有限公司 | A fast locking structure |
-
2013
- 2013-01-23 CN CN 201320037784 patent/CN203051409U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465126A (en) * | 2016-01-05 | 2016-04-06 | 昆山恩都照明有限公司 | Connecting structure capable of preventing screw from falling off |
| TWI829553B (en) * | 2023-03-10 | 2024-01-11 | 英業達股份有限公司 | A fast locking structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204082860U (en) | A kind of double nuts structure with locking functions | |
| CN203051409U (en) | Double-thread bolt | |
| CN203423339U (en) | Flatly-mounted wall socket mounting adjusting structure | |
| CN203051370U (en) | Self-breaking screw | |
| CN204593096U (en) | A kind of panel light with sealed sectional materials | |
| CN204431195U (en) | A kind of anti-lost screw attaching/detaching apparatus | |
| CN203822811U (en) | Waterproof nut | |
| CN204357890U (en) | A kind of anti-demounting bolt | |
| CN205905927U (en) | Enclose bumper before school bus | |
| CN204784046U (en) | Buckle structure easy to assemble, as to promote part outward appearance perceptual quality | |
| CN204572726U (en) | The plastic nut of anti-skid teeth | |
| CN205605610U (en) | Flange face hexagon nut | |
| CN207333418U (en) | A kind of nonstandard nut of milling train | |
| CN207598688U (en) | A kind of crane span structure system high-performance spring nut | |
| CN203536599U (en) | A cylindrical pin in a power plug | |
| CN203335802U (en) | Split type gear box cover | |
| CN207228852U (en) | One kind is without hinge rotating device | |
| CN202463303U (en) | Pen with medicine box | |
| CN202900924U (en) | Bolt used for adjusting interval of hinges | |
| CN202140402U (en) | Fastening screw | |
| CN203297585U (en) | High-sealing gear case | |
| CN203334814U (en) | Thread memory key | |
| CN202038557U (en) | Locking mechanism for box | |
| CN203109915U (en) | Multifunctional tool belt | |
| CN215805666U (en) | High-strength hexagon head bolt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |