CN203003464U - Combined hydraulic fastening device - Google Patents
Combined hydraulic fastening device Download PDFInfo
- Publication number
- CN203003464U CN203003464U CN 201220747351 CN201220747351U CN203003464U CN 203003464 U CN203003464 U CN 203003464U CN 201220747351 CN201220747351 CN 201220747351 CN 201220747351 U CN201220747351 U CN 201220747351U CN 203003464 U CN203003464 U CN 203003464U
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- CN
- China
- Prior art keywords
- piston
- cylinder body
- stretching
- fastening device
- swivel nut
- 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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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a combined hydraulic fastening device. The combined hydraulic fastening device comprises a piston, a cylinder body, a supporting sleeve and a stretching screw sleeve, wherein the outer diameter of the piston is provided with a stepped wall surface; the inner diameter of the piston adopts a threaded structure; an oil filling hole channel is arranged at the upper end of the piston along the axial direction; the cylinder body is coaxially sleeved outside the piston; the inner wall of the cylinder body is provided with a stepped wall surface which is in tight fit with the piston; an oil filling hole is formed on the side of the cylinder body; the supporting sleeve is sleeved at the outer boss end of the cylinder body; and the stretching screw sleeve is fixed in the piston through thread and positioning screws. The combined hydraulic fastening device can stretch and fasten various bolts with different diameters; the hydraulic fastening device does not need the stretching screw sleeve when stretching the bolt with bigger diameter, and the stretching screw sleeve with the corresponding specification can be added in the piston when the bolt with smaller diameter stretched, so that one set of hydraulic fastening device can be combined with various stretching screw sleeves with different screw diameters to stretch and fasten various bolts with different diameters.
Description
Technical field
The utility model belongs to the fastener technical field, relates to a kind of hydraulic fastener of realizing the bolt tension fastening effect by hydraulic coupling.
Background technology
Thereby hydraulic fastener is a kind of device of realizing strong fastening that bolt tension elongated and locked by hydraulic coupling, is the effective tool of fastening high-strength bolt.Its operation principle is to make bolt lengthening under the effect of super high pressure oil, produces a gap between nut and fastener, and fastening nut is eliminated the gap, and when shedding hydraulic coupling, screw rod can not bounce back equally, reaches the fastening and locking purpose of expection.But existing hydraulic fastener also has in actual use, and versatility is not strong, a kind of fastener of specification can not be realized the fastening deficiency of multiple different-diameter bolt tension.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, provide a kind of simple in structure, easy to operate, can realize the combination hydraulic fastener fastening to multiple different-diameter bolt tension.
For solving the problems of the technologies described above, implementation of the present utility model is such:
A kind of combination hydraulic fastener, comprise piston, cylinder body, support set and stretching swivel nut, piston external diameter has the stairstepping wall, internal diameter is helicitic texture, and the piston upper end edge is axially arranged with the oil filler point passage, and the cylinder body coaxial package is outside piston, its inwall has the stairstepping wall with the piston snug fit, and be provided with oil filler point in the side, and support set is sleeved on cylinder body evagination you, and the stretching swivel nut is fixed in piston by screw thread and dog screw.
In combinations thereof formula hydraulic fastener, said stretching swivel nut comprises a plurality ofly having the different inner diameters screw thread and can be separately fixed at swivel nut in piston.
Implementation of the present utility model also comprises: be nested to paste between the wall that coordinates at cylinder body and piston sealing ring is housed.
Combination hydraulic fastener described in the utility model can be realized the stretching of multiple different-diameter bolt fastening.When the larger bolt of stretching diameter, hydraulic fastener can add the stretching swivel nut; And when the diameter of tensile bolt hour, can install the stretching swivel nut of dimension additional in piston, such cover hydraulic fastener can from the stretching swivel nut combination in multiple different spiral shells footpath, thereby realized the stretching of multiple different-diameter bolt fastening.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of the utility model.
Fig. 2 is the structural representation that does not install the hydraulic fastener of stretching swivel nut additional.
Fig. 3 is the structural representation of stretching swivel nut.
In figure, the title of each label is respectively: 1-piston, 2-cylinder body, 3-back-up ring, 4-sealing ring, 5-sealing ring, 6-back-up ring, 7-support set, 8-dog screw, 9-stretching swivel nut, 10-steel ball, 11-screw plug.
The specific embodiment
Below with reference to accompanying drawing, the utility model content is described further, but actual fabrication structure of the present utility model is not limited in embodiment shown in the drawings.
referring to accompanying drawing, combination hydraulic fastener described in the utility model is by piston 1, cylinder body 2, the compositions such as support set 7 and stretching swivel nut 9, piston 1 external diameter has the stairstepping wall, internal diameter is helicitic texture, piston 1 upper end edge is axially arranged with the oil filler point passage, cylinder body 2 coaxial packages are outside piston 1, its inwall has the stairstepping wall with piston 1 snug fit, and be provided with oil filler point in the side, support set 7 is sleeved on cylinder body 2 evagination yous, stretching swivel nut 9 comprises a plurality of swivel nuts with different inner diameters screw thread, each swivel nut 9 that stretches all can be threaded with piston 1 use, and with dog screw 8, stretching swivel nut 9 and piston 1 are fixed together.In real work, when the larger bolt of stretching diameter, hydraulic fastener can add stretching swivel nut 9; And when the diameter of tensile bolt hour, just can install the stretching swivel nut 9 of dimension additional in piston, like this by changing different stretching swivel nuts 9, the stretching that can realize applicable multiple different size (diameter) bolt of cover hydraulic fastener is fastening, has intact versatility and displacement property.
Claims (3)
1. combination hydraulic fastener, it is characterized in that: comprise piston (1), cylinder body (2), support set (7) and stretching swivel nut (9), piston (1) external diameter has the stairstepping wall, internal diameter is helicitic texture, piston (1) upper end edge is axially arranged with the oil filler point passage, cylinder body (2) coaxial package is outside piston (1), its inwall has the stairstepping wall with piston (1) snug fit, and be provided with oil filler point in the side, support set (7) is sleeved on cylinder body (2) evagination you, stretching swivel nut (9) is fixed in piston (1) by screw thread and dog screw (8).
2. combination hydraulic fastener as claimed in claim 1 is characterized in that: said stretching swivel nut (9) comprises a plurality ofly having the different inner diameters screw thread and can be separately fixed at swivel nut in piston (1).
3. combination hydraulic fastener as claimed in claim 1, is characterized in that: paste between the wall that coordinates with piston (1) cover at cylinder body (2) sealing ring (4,5) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747351 CN203003464U (en) | 2012-12-31 | 2012-12-31 | Combined hydraulic fastening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747351 CN203003464U (en) | 2012-12-31 | 2012-12-31 | Combined hydraulic fastening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203003464U true CN203003464U (en) | 2013-06-19 |
Family
ID=48595097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220747351 Expired - Fee Related CN203003464U (en) | 2012-12-31 | 2012-12-31 | Combined hydraulic fastening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203003464U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386614A (en) * | 2013-08-06 | 2013-11-13 | 超捷紧固系统(上海)股份有限公司 | Automatic production system for vehicle fixed supporting sleeve |
| CN103934675A (en) * | 2014-05-14 | 2014-07-23 | 南通永创航海机械有限公司 | Hydraulic fitting bolt |
| CN109434374B (en) * | 2018-12-18 | 2020-11-27 | 重庆江增船舶重工有限公司 | Assembling method for compressor conical surface interference fit |
-
2012
- 2012-12-31 CN CN 201220747351 patent/CN203003464U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386614A (en) * | 2013-08-06 | 2013-11-13 | 超捷紧固系统(上海)股份有限公司 | Automatic production system for vehicle fixed supporting sleeve |
| CN103934675A (en) * | 2014-05-14 | 2014-07-23 | 南通永创航海机械有限公司 | Hydraulic fitting bolt |
| CN109434374B (en) * | 2018-12-18 | 2020-11-27 | 重庆江增船舶重工有限公司 | Assembling method for compressor conical surface interference fit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20131231 |