CN202639814U - Automatic reset system of single stage stretcher stroke - Google Patents
Automatic reset system of single stage stretcher stroke Download PDFInfo
- Publication number
- CN202639814U CN202639814U CN 201220320701 CN201220320701U CN202639814U CN 202639814 U CN202639814 U CN 202639814U CN 201220320701 CN201220320701 CN 201220320701 CN 201220320701 U CN201220320701 U CN 201220320701U CN 202639814 U CN202639814 U CN 202639814U
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- automatic reset
- reset system
- piston
- single stage
- stroke
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Abstract
The utility model discloses an automatic reset system of a single stage stretcher stroke. The automatic reset system of the single stage stretcher stroke is characterized in that the automatic reset system of the single stage stretcher stroke comprises a pulling rod, a piston, an oil cylinder, an end cap and a saucer-shaped spring. The pulling rod is of step cut shape, a reversed-L-shape end cap is installed on the outer portion of the pulling rod, and a spring is placed inside the space formed by the pulling rod and the reversed-L-shape end cap. When a stretcher of the automatic reset system of the single stage stretcher stroke is in use, the pulling rod is driven by the ultrahigh pressure oil pressure through the piston to move upwards, and therefore pretightening or loosing of a bolt can be achieved. When stretching reaches a designing stroke, pressure of a pump station can be released, and then the piston is automatically forced to move downwards through a tensile force of the spring, the piston is returned automatically and hydraulic oil backflows to the pump station. Compared with the prior art, the automatic reset system of the single stage stretcher stroke needs no artificial force any longer. According to the spring, automatical returning of the piston can be achieved. The automatic reset system of the single stage stretcher stroke is convenient to operate and high in efficiency.
Description
Technical field
The utility model relates to a kind of single-stage stretcher, relates in particular to the automatic reset system of single-stage stretcher stroke.
Background technology
The single-stage stretcher is the utensil of pretension or the nut of dismounting on the high-strength bolt, and it without frictionally damage, is the best approach of accurately controlling bolt pretightening to the contact-making surface that connects, and it is practical, the replaceable pulling peak with heading, and reduced labour intensity.Therefore it has been subject to welcoming more and more, but the structure that its stroke resets exists certain problem, as shown in Figure 2.When stretcher was worked, the super-pressure oil pressure moved upward by the piston pushing drawing rod, thereby reached tools for bolts ' pretension or tear loose purpose open; After stretching reached design runlength, piston can't self-return, at this moment must stir driving lever by manpower and force piston to move downward, and makes hydraulic oil be back to pumping plant.Therefore the stretcher troublesome poeration is wasted time and energy.
Summary of the invention
Problem to be solved in the utility model provides a kind of automatic reset system of stroke, after the single-stage stretcher is stretched to design runlength, discharges pump station pressure, and piston can self-return.Therefore, this stretcher is easy to operate, and efficient is higher.
The automatic reset system of the utility model single-stage stretcher stroke is characterized in that: it comprises pull bar, piston, oil cylinder, end cap, dish spring; Pull bar is notch cuttype, and its outer setting has inverted L-type end cap, is placed with spring in the space that both form.
When this novel stretcher work, the super-pressure oil pressure moves upward by the piston pushing drawing rod, thereby reaches tools for bolts ' pretension or tear loose purpose open; After stretching reaches design runlength, discharge pump station pressure, at this moment the tension force by spring forces piston to move downward automatically, makes the piston self-return, and hydraulic oil is back to pumping plant.This novel stretcher is compared with existing stretcher, no longer needs artificial exerting oneself, and relies on spring to realize the self-return of piston, and easy to operate, efficient is higher.
Description of drawings
Fig. 1 is the structural representation of this sigle-stage AC stretcher stroke automatic reset system.
Fig. 2 is the structural representation of existing single-stage stretcher resetting system.
The specific embodiment
As can be seen from Figure 1, the automatic reset system of this sigle-stage AC stretcher stroke, it comprises pull bar 1, piston 2, oil cylinder 3, end cap 4, dish spring 5; Pull bar 1 is notch cuttype, and its outer setting has inverted L-type end cap 4, is placed with spring 5 in the space that both form.
Because need to utilize the tension force of spring in the native system, so spring 5 is stage clip or dish spring.
When this novel stretcher work, the super-pressure oil pressure moves upward by the cascaded surface pushing drawing rod 1 that piston 2 contacts with pull bar 1, thereby reaches tools for bolts ' pretension or tear loose purpose open; After stretching reaches design runlength, discharge pump station pressure, at this moment the tension force by stage clip or dish spring 5 forces piston 2 to move downward automatically, makes piston 2 self-returns, and hydraulic oil is back to pumping plant.This novel stretcher is compared with existing stretcher, no longer needs artificial exerting oneself, and relies on stage clip or dish spring to realize the self-return of piston, and easy to operate, efficient is higher.
Claims (2)
1. the automatic reset system of single-stage stretcher stroke, it is characterized in that: it comprises pull bar (1), piston (2), oil cylinder (3), end cap (4), dish spring (5); Pull bar (1) is notch cuttype, and its outer setting has inverted L-type end cap (4), is placed with spring (5) in the space that both form.
2. automatic reset system according to claim 1, it is characterized in that: spring (5) is stage clip or dish spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320701 CN202639814U (en) | 2012-07-04 | 2012-07-04 | Automatic reset system of single stage stretcher stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320701 CN202639814U (en) | 2012-07-04 | 2012-07-04 | Automatic reset system of single stage stretcher stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202639814U true CN202639814U (en) | 2013-01-02 |
Family
ID=47408984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220320701 Expired - Fee Related CN202639814U (en) | 2012-07-04 | 2012-07-04 | Automatic reset system of single stage stretcher stroke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202639814U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624760A (en) * | 2016-12-31 | 2017-05-10 | 马鞍山市三江机械有限公司 | Overtravel alarming and resetting stretcher and stretching method thereof |
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN106736481A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of stretcher and its stretching and installation method |
| CN114012412A (en) * | 2021-11-04 | 2022-02-08 | 武汉铁阳科技有限公司 | Locomotive connecting rod bolt stretcher |
-
2012
- 2012-07-04 CN CN 201220320701 patent/CN202639814U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624760A (en) * | 2016-12-31 | 2017-05-10 | 马鞍山市三江机械有限公司 | Overtravel alarming and resetting stretcher and stretching method thereof |
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN106736481A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of stretcher and its stretching and installation method |
| CN114012412A (en) * | 2021-11-04 | 2022-02-08 | 武汉铁阳科技有限公司 | Locomotive connecting rod bolt stretcher |
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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: 20130102 Termination date: 20160704 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |