CN203509535U - Open type bolt tensioner with spring restoration - Google Patents
Open type bolt tensioner with spring restoration Download PDFInfo
- Publication number
- CN203509535U CN203509535U CN201320578212.9U CN201320578212U CN203509535U CN 203509535 U CN203509535 U CN 203509535U CN 201320578212 U CN201320578212 U CN 201320578212U CN 203509535 U CN203509535 U CN 203509535U
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- China
- Prior art keywords
- cylinder body
- hole
- open type
- piston
- pull
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- Expired - Fee Related
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Abstract
The utility model discloses an open type bolt tensioner with spring restoration. The open type bolt tensioner with the spring restoration comprises a cylinder body. A piston is arranged in the cylinder body in a sealing and matching mode. Through holes communicated with one another are formed in the piston. A pull rod is arranged in each through hole in a matching mode. A step guide hole is formed in each pull rod. The lower portion of each step guide hole is provided with an inner-threaded hole screwed with a bolt to be stretched. Sink grooves are formed in the upper end of the piston. Springs are clamped in the sink grooves. The tops of the springs are limited through cover plates on the upper end of the cylinder. The upper end of each pull rod extends out of the corresponding cover plate, and adjusting holes are distributed in the outer cylindrical face of each pull rod. A supporting sleeve is clamped at the bottom end of the cylinder body. A lifting sleeve is arranged in the supporting sleeve in a matching mode. A notch is formed in the middle of one side of the supporting sleeve. Pull holes are distributed in the circumference of the pull sleeve corresponding to the notch. Pull rods matched with the pull holes are further included. The open type bolt tensioner restores through the springs, and does not need to be pressed back through manpower, so that the labor efficiency of operators is improved. The open type is adopted, so that no requirements for the length, extending out of a nut, of a screw rod exist. The open type bolt tensioner is small in size and light in weight under the same pressure.
Description
Technical field
The utility model relates to a kind of stretcher, relates in particular to a kind of bolt tensioning jack of open type belt spring reset.
Background technology
Existing bolt tensioning jack is simple in structure, work bolt is mostly direct when stretching and piston spins together, after multi-drawing operation, piston easily damages with the screw thread that screws of work bolt, after damage, need to change whole piston, cause cost high, simultaneously when range marks by red marking line, use in running, need artificial observation constantly, also need manually to be pushed back simultaneously, in process hand labor intensity large, waste time and energy, inefficiency, can not meet instructions for use.
Utility model content
The purpose of this utility model is in order to make up the deficiency of prior art, and a kind of bolt tensioning jack of open type belt spring reset is provided.
The utility model is achieved through the following technical solutions:
A kind of bolt tensioning jack of open type belt spring reset, include cylinder body, in described cylinder body, be sealed with piston, it is characterized in that: in described piston, be provided with the through hole being interconnected, in described through hole, coordinate pull bar is installed, in described pull bar, be provided with step pilot hole, the bottom of described step pilot hole is and the internal thread hole for the treatment of that tensile bolt screws, the upper end of described piston is provided with deep gouge, in described deep gouge, be installed with spring, and spring top is spacing by the cover plate of cylinder body upper end, cover plate is stretched out in the upper end of described pull bar, and be distributed with adjustment hole on its external cylindrical surface, described cylinder body bottom is installed with support set, in described support set, coordinate pulling sleeve is installed, one middle side part of described support set is provided with breach, on the pulling sleeve circumferential position of described breach correspondence position, be distributed with pulling hole, also include the driving lever coordinating with pulling hole.
The cooperation place of described cylinder body inner carrier and the step surface of cylinder body is provided with oil inlet passage, and described oil inlet passage place is provided with snap joint.
The utility model has the advantages that:
Pull bar of the present utility model is installed separately, same stretcher can be equipped with different pull bars and pulling sleeve, tools for bolts ' pretension for different size, operating personnel are having the tools for bolts ' pretension of plurality of specifications on-the-spot, only need carry pull bar and the pulling sleeve of a stretcher and dimension, just can realize the tools for bolts ' pretension of many specifications; Spring reset, is pushed back without manpower, improves operating personnel's efficiency; This stretcher adopts open, screw rod is stretched out to nut length and do not require; Under equal tensile force, volume is little, lightweight.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
The specific embodiment
Referring to accompanying drawing, a kind of bolt tensioning jack of open type belt spring reset, include cylinder body 1, in cylinder body 1, be sealed with piston 2, in piston 2, be provided with the through hole being interconnected, in through hole, coordinate pull bar 3 is installed, in pull bar 3, be provided with step pilot hole, the bottom of step pilot hole is and the internal thread hole for the treatment of that tensile bolt screws, the upper end of piston 2 is provided with deep gouge 4, in deep gouge 4, be installed with spring 5, and spring 5 tops are spacing by the cover plate 6 of cylinder body upper end, cover plate 6 is stretched out in the upper end of pull bar 3, and on its external cylindrical surface, be distributed with adjustment hole 7, cylinder body 1 bottom is installed with support set 8, in support set 8, coordinate pulling sleeve 9 is installed, one middle side part of support set 8 is provided with breach, on the pulling sleeve circumferential position of breach correspondence position, be distributed with pulling hole 10, also include the driving lever 11 coordinating with pulling hole 10.Described cylinder body 1 inner carrier 2 is provided with oil inlet passage with the cooperation place of the step surface of cylinder body, and oil inlet passage place is provided with snap joint 12.
Claims (2)
1. the bolt tensioning jack of an open type belt spring reset, include cylinder body, in described cylinder body, be sealed with piston, it is characterized in that: in described piston, be provided with the through hole being interconnected, in described through hole, coordinate pull bar is installed, in described pull bar, be provided with step pilot hole, the bottom of described step pilot hole is and the internal thread hole for the treatment of that tensile bolt screws, the upper end of described piston is provided with deep gouge, in described deep gouge, be installed with spring, and spring top is spacing by the cover plate of cylinder body upper end, cover plate is stretched out in the upper end of described pull bar, and be distributed with adjustment hole on its external cylindrical surface, described cylinder body bottom is installed with support set, in described support set, coordinate pulling sleeve is installed, one middle side part of described support set is provided with breach, on the pulling sleeve circumferential position of described breach correspondence position, be distributed with pulling hole, also include the driving lever coordinating with pulling hole.
2. the bolt tensioning jack of open type belt spring reset according to claim 1, is characterized in that: the cooperation place of described cylinder body inner carrier and the step surface of cylinder body is provided with oil inlet passage, and described oil inlet passage place is provided with snap joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578212.9U CN203509535U (en) | 2013-09-17 | 2013-09-17 | Open type bolt tensioner with spring restoration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578212.9U CN203509535U (en) | 2013-09-17 | 2013-09-17 | Open type bolt tensioner with spring restoration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203509535U true CN203509535U (en) | 2014-04-02 |
Family
ID=50368517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320578212.9U Expired - Fee Related CN203509535U (en) | 2013-09-17 | 2013-09-17 | Open type bolt tensioner with spring restoration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203509535U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552149A (en) * | 2014-12-10 | 2015-04-29 | 马鞍山市益华液压机具有限公司 | Single-stage thin-type bolt tensioner |
-
2013
- 2013-09-17 CN CN201320578212.9U patent/CN203509535U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552149A (en) * | 2014-12-10 | 2015-04-29 | 马鞍山市益华液压机具有限公司 | Single-stage thin-type bolt tensioner |
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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 |