CN203509533U - Single-stage short bolt stretcher - Google Patents
Single-stage short bolt stretcher Download PDFInfo
- Publication number
- CN203509533U CN203509533U CN201320577812.3U CN201320577812U CN203509533U CN 203509533 U CN203509533 U CN 203509533U CN 201320577812 U CN201320577812 U CN 201320577812U CN 203509533 U CN203509533 U CN 203509533U
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- CN
- China
- Prior art keywords
- hole
- cylinder body
- piston
- holder
- nut sleeve
- 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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- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The utility model discloses a single-stage short bolt stretcher which comprises a fixed seat, wherein a nut sleeve is installed in the fixed seat in a matched mode, a gap is formed in the middle of one side of the fixed seat, adjusting holes are distributed in the circumferential position, corresponding to the gap, of the nut sleeve, a cylinder body is installed on the upper end face of the fixed seat in a pressed mode, a piston is installed in the cylinder body in a sealed mode, a through hole is formed in the middle of the piston, a puller provided with a step guide hole in the middle is installed in the through hole in a matched mode, the lower end of the step guide hole is provided with an internal thread which is connected with a threaded rod to be stretched in a threaded mode, adjusting holes are also distributed in the outer cylindrical surface of the upper end of the puller, a cover plate is installed at the top end of the cylinder body in a matched mode, the upper end of the piston penetrates through the middle of the cover plate. The single-stage short bolt stretcher further comprises adjusting rods matched with the adjusting holes. The single-stage short bolt stretcher is simple in structure, convenient to maintain, low in price, and suitable for pre-tightening bolts with various lengths since an open type is adopted; the bolts with different sizes can be pre-tightened or loosened through the same bolt stretcher, but the puller and the nut sleeve must be replaced.
Description
Technical field
The utility model relates to a kind of stretcher, relates in particular to the short type bolt tensioning jack of a kind of single-stage.
Background technology
Existing bolt tensioning jack is simple in structure, when short type bolt is stretched, excessive for fear of pressure, therefore cylinder body have strict requirement with structure piston, universal performance is low, therefore to there being the tools for bolts ' pretension of plurality of specifications on-the-spot, the stretcher of various special uses be need to configure, cost and hand labor intensity increased.
Utility model content
The purpose of this utility model is in order to make up the deficiency of prior art, provides a kind of single-stage short type bolt tensioning jack.
The utility model is achieved through the following technical solutions:
The short type bolt tensioning jack of a kind of single-stage, it is characterized in that: include holder, in described holder, coordinate nut sleeve is installed, one middle side part of described holder is provided with breach, on the nut sleeve circumferential position of described breach correspondence position, be distributed with adjustment hole, described holder upper surface is pressed with cylinder body, in described cylinder body, be provided with stepped hole, in described stepped hole, be sealed and installed with piston, the middle part of described piston is provided with through hole, in described through hole, coordinate and middle part is installed with the pull head of step pilot hole, the bottom of described step pilot hole is provided with the internal thread screwing with screw rod to be stretched, on the external cylindrical surface of described pull head upper end, be also distributed with adjustment hole, the external cylindrical surface middle part of described piston is provided with annular boss, cylinder body corresponding to described annular boss lower surface is provided with oil inlet passage, the oil-in of described oil inlet passage is provided with snap joint, the top cooperation of described cylinder body is provided with cover plate, the upper end of described piston is through cover plate middle part, and coordinate with its guiding, also include the adjusting rod coordinating with adjustment hole.
Described piston upper end external cylindrical surface is provided with thin red line.
The utility model has the advantages that:
The utility model is simple in structure, easy to maintenance, low price, adopt open, the tools for bolts ' pretension of applicable all lengths, the bolt of different size can or dismantle with same bolt tensioning jack pretension, but must change pull head and nut sleeve.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
The specific embodiment
Referring to accompanying drawing, the short type bolt tensioning jack of a kind of single-stage, include holder 6, in holder 6, coordinate nut sleeve 5 is installed, one middle side part of holder 6 is provided with breach, on nut sleeve 5 circumferential positions of breach correspondence position, be distributed with adjustment hole 9, holder 6 upper surfaces are pressed with cylinder body 3, in cylinder body 3, be provided with stepped hole, in stepped hole, be sealed and installed with piston 8, the middle part of piston 8 is provided with through hole, in through hole, coordinate and middle part is installed with the pull head 1 of step pilot hole, the bottom of step pilot hole is provided with the internal thread screwing with screw rod to be stretched, on the external cylindrical surface of pull head 1 upper end, be also distributed with adjustment hole 9, the external cylindrical surface middle part of piston 8 is provided with annular boss, cylinder body 3 corresponding to annular boss lower surface is provided with oil inlet passage, the oil-in of oil inlet passage is provided with snap joint 4, the top cooperation of cylinder body 3 is provided with cover plate 2, the upper end of piston 8 is through cover plate 2 middle parts, and coordinate with its guiding, also include the adjusting rod 7 coordinating with adjustment hole 9.Piston 8 upper end external cylindrical surfaces are provided with thin red line.
(1) operation principle:
A. holder 6 and nut sleeve 5 are enclosed within on nut, guarantee supporting surface and the bolt axis of holder 6
Vertically, holder axis and bolt axis coaxle.
B. cylinder body 3 is placed on holder 6, pull head 1 is put in cylinder body, use adjusting rod 7 dextrorotation pull heads 1, pull head 1 is screwed on bolt completely.
C. after hydraulic elongator and pumping plant being connected with high-pressure rubber pipe, relief lever on locking pumping plant, operation depression bar is observed gauge hand, when gauge hand points to required pressure simultaneously, unclamp depression bar, with adjusting rod, 7 rotating nuts covers 5(are locking nut clockwise, counterclockwise for unscrewing nut), and observe whether joint close of bolt and supporting surface by peep hole, after joint close, can unscrew relief lever, now bolt has reached predetermined pretension effect.
If d. stretcher has reached range (seeing thin red line), stop immediately upper pressure, with adjusting rod 7 rotating nut covers 5, make after nut and supporting surface joint close, unscrew the relief lever on pumping plant, then with adjusting rod 7, rotate the adjustment hole of pull heads 1, pull head 1 screws relief lever downwards again after screwing, repeating step c, until pump station pressure reaches required pressure.
E. when bolt reaches after pretension requirement, unscrew the relief lever on pumping plant, can take off stretcher.
Claims (2)
1. the short type bolt tensioning jack of single-stage, it is characterized in that: include holder, in described holder, coordinate nut sleeve is installed, one middle side part of described holder is provided with breach, on the nut sleeve circumferential position of described breach correspondence position, be distributed with adjustment hole, described holder upper surface is pressed with cylinder body, in described cylinder body, be provided with stepped hole, in described stepped hole, be sealed and installed with piston, the middle part of described piston is provided with through hole, in described through hole, coordinate and middle part is installed with the pull head of step pilot hole, the bottom of described step pilot hole is provided with the internal thread screwing with screw rod to be stretched, on the external cylindrical surface of described pull head upper end, be also distributed with adjustment hole, the external cylindrical surface middle part of described piston is provided with annular boss, cylinder body corresponding to described annular boss lower surface is provided with oil inlet passage, the oil-in of described oil inlet passage is provided with snap joint, the top cooperation of described cylinder body is provided with cover plate, the upper end of described piston is through cover plate middle part, and coordinate with its guiding, also include the adjusting rod coordinating with adjustment hole.
2. the short type bolt tensioning jack of single-stage according to claim 1, is characterized in that: described piston upper end external cylindrical surface is provided with thin red line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577812.3U CN203509533U (en) | 2013-09-17 | 2013-09-17 | Single-stage short bolt stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577812.3U CN203509533U (en) | 2013-09-17 | 2013-09-17 | Single-stage short bolt stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203509533U true CN203509533U (en) | 2014-04-02 |
Family
ID=50368515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320577812.3U Expired - Fee Related CN203509533U (en) | 2013-09-17 | 2013-09-17 | Single-stage short bolt stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203509533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108000125A (en) * | 2017-12-12 | 2018-05-08 | 马鞍山市益华液压机具有限公司 | A kind of gear driven mechanism for hydraulic elongator |
-
2013
- 2013-09-17 CN CN201320577812.3U patent/CN203509533U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108000125A (en) * | 2017-12-12 | 2018-05-08 | 马鞍山市益华液压机具有限公司 | A kind of gear driven mechanism for hydraulic elongator |
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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: 20140402 Termination date: 20150917 |
|
| EXPY | Termination of patent right or utility model |