CN104847769A - Double-end stud - Google Patents
Double-end stud Download PDFInfo
- Publication number
- CN104847769A CN104847769A CN201410054354.4A CN201410054354A CN104847769A CN 104847769 A CN104847769 A CN 104847769A CN 201410054354 A CN201410054354 A CN 201410054354A CN 104847769 A CN104847769 A CN 104847769A
- Authority
- CN
- China
- Prior art keywords
- rod
- stud
- main body
- screw
- short
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses mechanical part connecting parts, and relates to a double-end stud. The double-end stud comprises a connecting rod, a short threaded rod and a long threaded rod, wherein the short threaded rod and the long threaded hole are arranged at the two ends of the connecting rod and are integrally connected with the connecting rod. A jacking rod is arranged on the head of the short threaded rod. When the short threaded rod with the jacking rod on the top is screwed into a main threaded hole by the enough screwing length, and the threaded root portion of the short threaded rod is not screwed into the main threaded hole, the jacking rod jacks the bottom of the main threaded hole firstly, and by means of jacking force between the jacking rod and the bottom of the main threaded hole, the double-end stud is fixed to a main body.
Description
Technical field
The present invention relates to a kind of mechanical parts link, belong to stud technical field.
Background technique
Stud is the threaded cylindrical fastening pieces in a kind of two ends, is widely used in electric power, chemical industry, oil refining, valve, railway, bridge, steel structure, vapour rub accessory, machinery, boiler steel structure, tower crane, large-span steel and heavy construction etc.During use, its one end is screwed into main body, and after installing annex, another end band upper cap nut is carried out fastening.Because annex is often dismounting, when direct main body with bolts and annex, main body thread can wear and tear or damage in the course of time, the use of stud, is very easy to the dismounting of annex, changes and install.
Be connecting rod in the middle of existing stud, one end of connecting rod is provided with short screw, and the other end is provided with long bolt.During application, the short screw of stud needs all to screw in main body screw hole, rely on the squeezing action of thread root and main body screw, stud is made to be fixed in body element, now the thread root of the short screw power that is squeezed is maximum, produces larger stress and concentrates, make this position become the most weak spot of stud, when the stud that diameter can not be used larger by structural limitations, stud easily ruptures from this position in the course of the work.
Summary of the invention
The object of the present invention is to provide a kind of new stud, solve above-mentioned stud in use, the problem of fracture easily occurs at the thread root screwing in main body.
Principle of the present invention and technological scheme are: a kind of stud, comprise connecting rod 2 and the short screw 1, the long bolt 3 that are located at two ends and connecting rod 2 one and are connected, are provided with top-fastening rod 4 at the head of described short screw 1.
Described top-fastening rod 4, its diameter dimension d is less than the main body screw bottom diameter D corresponding to screw thread specification, i.e. d < D, its length dimension L sets as required, enough screwing lengths are kept and when the thread root of short screw 1 not yet screws in main body screw hole so that short screw 1 and main body screw can be realized, top-fastening rod 4 first with bottom main body screw hole holds out against and is advisable, and the scope of L may be selected to be 0.3D≤L≤1.5D.
The invention has the beneficial effects as follows: the short screw 1 being provided with top-fastening rod 4 when stud head screws in the enough screwing lengths of main body screw, and when the thread root of short screw 1 not yet screws in main body screw hole, top-fastening rod 4 first holds out against with the bottom in main body screw hole, the mode relying on the thread root of short screw 1 to be fixed by the extruding force of main body screw stud in prior art, change into the mode that the present invention relies on top-fastening rod 4 to be fixed with the pressure bottom main body screw hole, now because the screw thread of short screw 1 does not all screw in main body screw, thus avoid stud in prior art to produce the concentrated phenomenon of larger stress at the thread root of short screw 1, when the stud because diameter being used larger by structural limitations, solve the problem that stud easily occurs at the thread root of short screw 1 to rupture.
Adopt a kind of stud of the present invention further beneficial effect be: can avoid in use because the stud main body caused that rupture is scrapped, reduction maintenance cost.
Accompanying drawing explanation
Fig. 1: be a kind of stud structural representation of the present invention.
Fig. 2: for a kind of stud of the present invention screws in the structural representation after main body screw.
In figure: 1, short screw, 2, connecting rod, 3, long bolt, 4, top-fastening rod.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in detail.
As shown in Figure 1 and Figure 2, a kind of stud, comprise connecting rod 2 and the short screw 1, the long bolt 3 that are located at two ends and connecting rod 2 one and are connected, top-fastening rod 4 is provided with at the head of described short screw 1, the diameter dimension d of top-fastening rod 4 is less than the main body screw bottom diameter D corresponding to screw thread specification, the length dimension L of top-fastening rod 4, when making to hold out against bottom described top-fastening rod 4 and main body screw hole, described short screw 1 can screw in the enough screwing lengths of main body screw, and the thread root of described short screw 1 not yet screws in main body screw hole.
During use, when the short screw 1 that head is provided with top-fastening rod 4 screws in the enough screwing lengths of main body screw and not yet screws in main body screw hole at the thread root of short screw 1, top-fastening rod 4 first holds out against with the bottom in main body screw hole, relies on top-fastening rod 4 to be fixed in main body by stud with the pressure bottom main body screw hole.
A kind of stud of the application of the invention, the mode relying on the thread root of short screw 1 to be fixed by the extruding force of main body screw stud in prior art, change into the mode that the present invention relies on top-fastening rod 4 to be fixed with the pressure bottom main body screw hole, avoid stud and produce at the thread root of short screw 1 phenomenon that larger stress concentrates, thus solve stud and easily breakage problem occurs at the thread root of short screw 1; And can effectively prevent from, because the stud main body caused that ruptures is scrapped, reducing maintenance cost.
It should be pointed out that those skilled in the art are subject to the inspiration of the technology of the present invention principle will make the improvement being different from the present embodiment, any improvement not departing from the technology of the present invention principle, all should be included within protection scope of the present invention.
Claims (2)
1. a stud, comprises connecting rod (2) and the short screw (1), the long bolt (3) that are located at two ends and connecting rod (2) one and are connected, it is characterized in that being provided with top-fastening rod (4) at the head of described short screw (1).
2. a kind of stud according to claim 1, is characterized in that the diameter dimension d of described top-fastening rod (4) is less than the main body screw bottom diameter D corresponding to screw thread specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054354.4A CN104847769A (en) | 2014-02-18 | 2014-02-18 | Double-end stud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054354.4A CN104847769A (en) | 2014-02-18 | 2014-02-18 | Double-end stud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104847769A true CN104847769A (en) | 2015-08-19 |
Family
ID=53847657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410054354.4A Pending CN104847769A (en) | 2014-02-18 | 2014-02-18 | Double-end stud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104847769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006045A (en) * | 2017-11-29 | 2018-05-08 | 芜湖强振汽车紧固件有限公司 | A kind of thermostable double end self-locking screw |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137121A (en) * | 1997-07-17 | 1999-02-09 | Saga Tekkosho:Kk | Stud thread structure |
| CN2415195Y (en) * | 2000-03-15 | 2001-01-17 | 石季尧 | Bidirectional balanced locating bolt |
| CN202301390U (en) * | 2011-10-12 | 2012-07-04 | 上海底特精密紧固件有限公司 | Loosing-preventing double-screw bolt |
| EP2517866A1 (en) * | 2011-04-28 | 2012-10-31 | Lockheed Martin Corporation | Fastening device and method to produce it |
| CN202510134U (en) * | 2012-04-25 | 2012-10-31 | 岳邦富 | Novel sealing friction board fixing device of concrete sprayer |
| CN203702807U (en) * | 2014-02-18 | 2014-07-09 | 山东华源莱动内燃机有限公司 | Double-end stud |
-
2014
- 2014-02-18 CN CN201410054354.4A patent/CN104847769A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137121A (en) * | 1997-07-17 | 1999-02-09 | Saga Tekkosho:Kk | Stud thread structure |
| CN2415195Y (en) * | 2000-03-15 | 2001-01-17 | 石季尧 | Bidirectional balanced locating bolt |
| EP2517866A1 (en) * | 2011-04-28 | 2012-10-31 | Lockheed Martin Corporation | Fastening device and method to produce it |
| CN202301390U (en) * | 2011-10-12 | 2012-07-04 | 上海底特精密紧固件有限公司 | Loosing-preventing double-screw bolt |
| CN202510134U (en) * | 2012-04-25 | 2012-10-31 | 岳邦富 | Novel sealing friction board fixing device of concrete sprayer |
| CN203702807U (en) * | 2014-02-18 | 2014-07-09 | 山东华源莱动内燃机有限公司 | Double-end stud |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006045A (en) * | 2017-11-29 | 2018-05-08 | 芜湖强振汽车紧固件有限公司 | A kind of thermostable double end self-locking screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150819 |
|
| RJ01 | Rejection of invention patent application after publication |