CN204127072U - A kind of hydraulic fitting bolt - Google Patents
A kind of hydraulic fitting bolt Download PDFInfo
- Publication number
- CN204127072U CN204127072U CN201420539951.1U CN201420539951U CN204127072U CN 204127072 U CN204127072 U CN 204127072U CN 201420539951 U CN201420539951 U CN 201420539951U CN 204127072 U CN204127072 U CN 204127072U
- Authority
- CN
- China
- Prior art keywords
- bolt shank
- lining
- bolt
- shank
- conical surface
- 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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Abstract
The utility model relates to a kind of hydraulic fitting bolt, it comprises bolt shank and is set in the nut of bolt shank periphery, described bolt shank two ends are provided with the screw thread chamfering with tapering, lining is provided with in the middle part of described bolt shank, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining, described sleeve surface and bolt shank outer surface by conical surface with the use of, one end of described bolt shank is provided with oil nozzle, described lining and bolt shank are blind-mate state, are provided with groove between described bolt shank and lining; After adopting said structure, when when applying an opposite effect power axially to bolt shank and lining, the conical surface that will be cooperatively interacted by it produces a radial stress expanded many times to lining, the size of fastening force can very accurately control by adjusting piston oil pressure, the total pressure of whole coupling and the even of pressure distribution can be ensured, to coupling center centering result auto modification, installation precision can be guaranteed and effectively can control magnitude of interference.
Description
Technical field
The utility model relates to a kind of hydraulic fitting bolt, refers more particularly to a kind of Novel bolt on flange coupling.
Background technique
At present, interference fit or transition fit often between traditional fitting-up bolt and hole, bolt needs to make freezing processing before installing, bolt is shunk, along with temperature raises, bolt expands just tightly swollen with hole, if when maintenance or fitting-up bolt are dismantled, Bolt dismantling inconvenience, it must be taken out from hole by special tool(s) or in the mode of knocking, operating process is slow, and the drive fit face of the bolt after dismounting and hole have wearing and tearing, burnt out by fitting surface, bolt easily causes to scrap and again makes.
Summary of the invention
The technical problems to be solved in the utility model be to provide a kind of convenient disassembly, not easy to wear, can reuse and the hydraulic fitting bolt that hole and bolt are not damaged.
In order to solve the problems of the technologies described above, the utility model provides a kind of hydraulic fitting bolt, it comprises bolt shank and is set in the nut of bolt shank periphery, described bolt shank two ends are provided with the screw thread chamfering with tapering, lining is provided with in the middle part of described bolt shank, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining, described sleeve surface and bolt shank outer surface by conical surface with the use of, one end of described bolt shank is provided with oil nozzle, described lining and bolt shank are blind-mate state, are provided with groove between described bolt shank and lining.
Described bolt shank is arranged on the shaft coupling of marine shafting, and is fixed on shaft coupling by bolt shank by nut.
Compared with prior art, the utility model advantage is:
By the bolt shank of appearance with the screw thread chamfering of tapering, endoporus is with the lining of corresponding tapering and locknut composition, hydraulic bolt is similar to EXPANSION ANCHOR BOLTS, lining is provided with in the middle part of described bolt shank, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining, sleeve surface and the outer surface of hydraulic bolt are that the conical surface that tapering is identical coordinates, when when applying an opposite effect power axially to bolt shank and lining, the conical surface that will be cooperatively interacted by it produces a radial stress expanded many times to lining, the size of fastening force can very accurately control by adjusting piston oil pressure, the total pressure of whole coupling and the even of pressure distribution can be ensured, described lining and bolt shank are blind-mate state, can to coupling center centering result auto modification, guarantee installation precision and effectively can control magnitude of interference.
The design of hydraulic tensioning fitting-up bolt overcomes drawback, stretching fitting-up bolt bar is in close-fitting state under operating conditions, in a free state, lining is outer little through the internal diameter than matching hole, bolt shank does not need extra process to put into hole together with lining, in dismounting, only use takes a few minutes detachable complete set bolt assembly, damages bolt shank and Kong Junwu.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model hydraulic fitting bolt.
Fig. 2 is the utility model hydraulic fitting bolt erection drawing.
Embodiment
As shown in Figure 1-2, a kind of hydraulic fitting bolt, it comprises bolt shank 1 and is set in the nut 2 of bolt shank 1 periphery, described bolt shank 1 two ends are provided with the screw thread chamfering with tapering, lining 3 is provided with in the middle part of described bolt shank 1, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining 3, described lining 3 surface and bolt shank 1 outer surface by conical surface with the use of, one end of described bolt shank 1 is provided with oil nozzle 4, described lining 3 is blind-mate state with bolt shank 1, is provided with groove 6 between described bolt shank 1 and lining 3; Described bolt shank 1 is arranged on the shaft coupling 5 of marine shafting, and is fixed on shaft coupling 5 by bolt shank 1 by nut 2.
First, first interstage bushing 3 is put into mating holes, lining 3 endoporus small end should be consistent with draw direction, in lining 3, bolt shank 1 is loaded again from opposite side, implement the axial tension of bolt in tapered sleeve endoporus, the radial dilatation of tapered sleeve cylindrical in the middle of being formed, in the middle of after its axial dimension should ensure to stretch, tapered sleeve is in flange group neutral position, and the Gewindefreistiche of bolt is exposed at outside end face of flange after avoiding stretching, complete the axial tension of bolt, nut 2 pretension can be carried out, when i.e. fastening nut after pressure increase to design load, thereafter release, screw thread shortens, nut 2 i.e. pretension.
Hydraulic tensioning fitting-up bolt, coordinate with interstage bushing 3 by there being the screw thread chamfering of tapering in the middle part of bolt shank 1, by axial hydraulic expansive force, bolt shank 1 is strained to small end, squeeze swollen by bolt shank 1 in the middle part of it, lining 3 is expanded, and its outer round surface contacts with bolt hole internal surface and swelling, after cancelling the hydraulic buckling to bolt, bolt, under the effect of axial elasticity restoring force, makes nut tightening.
Sleeve surface and the outer surface of hydraulic bolt are that the conical surface that tapering is identical coordinates, when when applying an opposite effect power axially to bolt shank and lining, the conical surface that will be cooperatively interacted by it produces a radial stress expanded many times to lining, the size of fastening force can very accurately control by adjusting piston oil pressure, the total pressure of whole coupling and the even of pressure distribution can be ensured, described lining and bolt shank are blind-mate state, can to coupling center centering result auto modification, guarantee installation precision and effectively can control magnitude of interference.
Claims (3)
1. a hydraulic fitting bolt, it is characterized in that: it comprises bolt shank (1) and is set in the peripheral nut (2) of bolt shank (1), described bolt shank (1) two ends are provided with the screw thread chamfering with tapering, described bolt shank (1) middle part is provided with lining (3), the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining (3), described lining (3) surface with bolt shank (1) outer surface by conical surface with the use of, one end of described bolt shank (1) is provided with oil nozzle (4), and described lining (3) and bolt shank (1) are blind-mate state.
2. hydraulic fitting bolt according to claim 1, is characterized in that: described bolt shank (1) is arranged on the shaft coupling (5) of marine shafting, and is fixed on shaft coupling (5) by bolt shank (1) by nut (2).
3. hydraulic fitting bolt according to claim 1, is characterized in that: be provided with groove (6) between described bolt shank (1) and lining (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420539951.1U CN204127072U (en) | 2014-09-19 | 2014-09-19 | A kind of hydraulic fitting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420539951.1U CN204127072U (en) | 2014-09-19 | 2014-09-19 | A kind of hydraulic fitting bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204127072U true CN204127072U (en) | 2015-01-28 |
Family
ID=52383431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420539951.1U Expired - Fee Related CN204127072U (en) | 2014-09-19 | 2014-09-19 | A kind of hydraulic fitting bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204127072U (en) |
-
2014
- 2014-09-19 CN CN201420539951.1U patent/CN204127072U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20180919 |