CN203702807U - Double-end stud - Google Patents
Double-end stud Download PDFInfo
- Publication number
- CN203702807U CN203702807U CN201420069164.5U CN201420069164U CN203702807U CN 203702807 U CN203702807 U CN 203702807U CN 201420069164 U CN201420069164 U CN 201420069164U CN 203702807 U CN203702807 U CN 203702807U
- Authority
- CN
- China
- Prior art keywords
- screw
- stud
- main body
- short screw
- rod
- 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
Links
Abstract
The utility model discloses a mechanical part connection element, and provides a double-end stud. The double-end stud comprises a connection rod, a short screw and a long screw, wherein the short screw and the long screw are arranged at the two ends of the connection rod and are connected with the connection rod integrally. The head portion of the short screw is provided with a pressing rod. When the short screw provided with the pressing rod on the head portion is screwed into a body thread hole for an enough screwing length and the threaded root portion of the short screw is not screwed into the body thread hole, the pressing rod abuts against the bottom of the body thread hole firstly, and then the double-end stud is fixed to a body with the dependence on pressing force of the pressing rod and the bottom of the main thread hole.
Description
Technical field
The utility model relates to a kind of mechanical parts link, belongs 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.When use, its one end is screwed into main body, install annex after the upper cap nut of the other end band carry 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, and the dismounting, the replacing that are very easy to annex are installed.
In the middle of existing stud, be connecting rod, one end of connecting rod is provided with short screw, and the other end is provided with long bolt.When 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 fixed in body element, the now thread root of the short screw power maximum that is squeezed, produces larger stress and concentrates, and makes this position become the weak spot of stud, in the time being subject to structural limitations can not use the larger stud of diameter, stud easily ruptures from this position in the course of the work.
Summary of the invention
The purpose of this utility model is to provide a kind of new stud, solves above-mentioned stud in use, and the problem of fracture easily occurs at the thread root that screws in main body.
Principle of the present utility model 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 are connected with connecting rod 2 one, and be 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 corresponding main body screw bottom diameter of screw thread specification D, be d < D, its length dimension L sets as required, can realize that short screw 1 and main body screw keep enough screwing lengths and in the time that the thread root of short screw 1 not yet screws in main body screw hole, top-fastening rod 4 first holds out against and is advisable with bottom, main body screw hole, and the scope of L may be selected to be 0.3D≤L≤1.5D.
The beneficial effects of the utility model are: the short screw 1 that is provided with top-fastening rod 4 when stud head screws in the enough screwing lengths of main body screw, and in the time that 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 that relies on the thread root of short screw 1 be fixed by the extruding force of main body screw stud in prior art, change into the mode that the utility model relies on top-fastening rod 4 and the pressure of bottom, main body screw hole to be fixed, now because the screw thread of short screw 1 does not all screw in main body screw, thereby avoid stud in prior art to produce the larger concentrated phenomenon of stress at the thread root of short screw 1, when being subject to structural limitations cannot use the larger stud of diameter, solve stud the problem rupturing has easily occurred at the thread root of short screw 1.
Adopt a kind of stud of the utility model further beneficial effect be: can avoid in use scrapping because of the stud main body causing that rupture reduction maintenance cost.
Accompanying drawing explanation
Fig. 1: be a kind of stud structural representation of the utility model.
Fig. 2: for a kind of stud of the utility model 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 elaborated.
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 are connected with connecting rod 2 one, be provided with top-fastening rod 4 at the head of described short screw 1, the diameter dimension d of top-fastening rod 4 is less than the corresponding main body screw bottom diameter of screw thread specification D, the length dimension L of top-fastening rod 4, when described top-fastening rod 4 is held out against with bottom, 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.
When use, the short screw 1 that is provided with top-fastening rod 4 when head screws in the enough screwing lengths of main body screw and in the time that 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, relies on top-fastening rod 4 and the pressure of bottom, main body screw hole that stud is fixed in main body.
By using a kind of stud of the utility model, the mode that relies on the thread root of short screw 1 be fixed by the extruding force of main body screw stud in prior art, change into the mode that the utility model relies on top-fastening rod 4 and the pressure of bottom, main body screw hole to be fixed, avoid stud to produce the larger concentrated phenomenon of stress at the thread root of short screw 1, at the thread root of short screw 1, breakage problem has easily occurred thereby solved stud; And can effectively prevent from scrapping because of the stud main body causing that ruptures, reduce maintenance cost.
It should be pointed out that those skilled in the art are subject to the inspiration of the utility model know-why will make the improvement that is different from the present embodiment, any improvement that does not depart from the utility model know-why, within all should being included in protection domain of the present utility model.
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 are connected with connecting rod (2) one, 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 corresponding main body screw bottom diameter of screw thread specification D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069164.5U CN203702807U (en) | 2014-02-18 | 2014-02-18 | Double-end stud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069164.5U CN203702807U (en) | 2014-02-18 | 2014-02-18 | Double-end stud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702807U true CN203702807U (en) | 2014-07-09 |
Family
ID=51053257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420069164.5U Expired - Fee Related CN203702807U (en) | 2014-02-18 | 2014-02-18 | Double-end stud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702807U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847769A (en) * | 2014-02-18 | 2015-08-19 | 山东华源莱动内燃机有限公司 | Double-end stud |
-
2014
- 2014-02-18 CN CN201420069164.5U patent/CN203702807U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847769A (en) * | 2014-02-18 | 2015-08-19 | 山东华源莱动内燃机有限公司 | Double-end stud |
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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: 20140709 Termination date: 20220218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |