CN201067889Y - Hydraulic pretightening device - Google Patents
Hydraulic pretightening device Download PDFInfo
- Publication number
- CN201067889Y CN201067889Y CNU2007200259685U CN200720025968U CN201067889Y CN 201067889 Y CN201067889 Y CN 201067889Y CN U2007200259685 U CNU2007200259685 U CN U2007200259685U CN 200720025968 U CN200720025968 U CN 200720025968U CN 201067889 Y CN201067889 Y CN 201067889Y
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- CN
- China
- Prior art keywords
- tightening
- hydraulic
- hydraulic cylinder
- cushion block
- annular piston
- 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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- Presses And Accessory Devices Thereof (AREA)
Abstract
A hydraulic preloading device comprises a connecting nut which is arranged above a press tightening nut and at the end of the tightening bolt, a hydraulic cylinder connected with the connecting nut by screw thread, an annular piston arranged in the hydraulic cylinder, a lower cushion block and an upper cushion block that are arranged below the annular piston and support the body of the press. The utility model is convenient for operating, uniform and exact in pre-tightening force, short in pretightening time, high in working efficiency and low in energy consumption, so the utility model can be widely applied to the pull rod pre-tightening of the body of metal forming machines.
Description
Affiliated technical field the present invention relates to a kind of hydraulic pre-tightening device, can be widely used in the metal forming machinery fuselage turnbuckle pretension.
Background technology
Existing pre-tightening apparatus is generally the heating pre-tightening apparatus, and pretightning force size and pretightning force uniformity are subject to the influence of the rigidity of structure and the error of calculation, and heat time heating time is longer, and power consumption is high.
Summary of the invention
The object of the present invention is to provide that a kind of easy to operate, pretightning force is all even accurately, pretension time weak point, high efficiency, hydraulic pre-tightening device that energy consumption is low.
In order to achieve the above object, hydraulic pre-tightening device of the present invention, comprise the attaching nut who is positioned at forcing press tightening nut top, is installed in the turnbuckle end, the hydraulic cylinder that is threaded with the attaching nut, be installed in the annular piston in the hydraulic cylinder, be installed in the annular piston below and be supported on lower cushion block and last cushion block on the press frame.
Hydraulic pre-tightening device of the present invention, its operation principle is: when hydraulic cylinder feeds pressure oil, produce pre-tensile force, hydraulic cylinder stretch-draw attaching nut, by the attaching nut with regard to pretension turnbuckle, turnbuckle can extend, like this, tightening nut and fuselage faying face produce the gap, at this moment tighten tightening nut again.After the hydraulic cylinder release, turnbuckle still keeps former pre-tensile force, thereby reaches the purpose of press frame pretension.
Hydraulic pre-tightening device of the present invention generally is applied to the pretension of combined frame turnbuckle, but also can be applicable to the pretension of integral body turnbuckle, to improve its rigidity and intensity.
Hydraulic pre-tightening device of the present invention is compared with the heating pre-tightening apparatus, by hydraulic coupling control, only is in the tensile state backspin at turnbuckle and strains at jack panel and get final product, and easy to operate, pretightning force is all even accurately, and the pretension time lacks, high efficiency, and energy consumption is low.Be particularly suitable in the occasion of forcing press batch process.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
Fig. 1 is a structural representation of the present invention.
In Fig. 1, hydraulic pre-tightening device of the present invention, comprise the attaching nut 1 who is positioned at forcing press tightening nut 6 tops, is installed in turnbuckle 7 ends, the hydraulic cylinder 2 that is threaded with the attaching nut, be installed in the annular piston 3 in the hydraulic cylinder, be installed in the annular piston below and be supported on lower cushion block 4 and last cushion block 5 on the press frame 8.
Claims (1)
1. hydraulic pre-tightening device, it is characterized in that, comprise the attaching nut who is positioned at forcing press tightening nut top, is installed in the turnbuckle end, the hydraulic cylinder that is threaded with the attaching nut, be installed in the annular piston in the hydraulic cylinder, be installed in the annular piston below and be supported on lower cushion block and last cushion block on the press frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200259685U CN201067889Y (en) | 2007-08-07 | 2007-08-07 | Hydraulic pretightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200259685U CN201067889Y (en) | 2007-08-07 | 2007-08-07 | Hydraulic pretightening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201067889Y true CN201067889Y (en) | 2008-06-04 |
Family
ID=39489262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200259685U Expired - Fee Related CN201067889Y (en) | 2007-08-07 | 2007-08-07 | Hydraulic pretightening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201067889Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120296A (en) * | 2011-01-25 | 2011-07-13 | 江苏拓盛重工机械有限公司 | Hydraulic preloading device of fixed bolt |
| CN103252641A (en) * | 2013-05-30 | 2013-08-21 | 太原重工股份有限公司 | Hydraulic pre-tightening tool |
| CN105108471A (en) * | 2015-09-23 | 2015-12-02 | 中国重型机械研究院股份公司 | Adjustable pretightening and fixing device |
| CN106475509A (en) * | 2016-12-05 | 2017-03-08 | 重集团大连设计研究院有限公司 | A kind of large-scale combined hydraulic press frame structure for being capable of constantly pretension |
| CN113195167A (en) * | 2018-12-21 | 2021-07-30 | 卡特彼勒能源方案有限公司 | Device for tensioning a connecting element |
-
2007
- 2007-08-07 CN CNU2007200259685U patent/CN201067889Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120296A (en) * | 2011-01-25 | 2011-07-13 | 江苏拓盛重工机械有限公司 | Hydraulic preloading device of fixed bolt |
| CN103252641A (en) * | 2013-05-30 | 2013-08-21 | 太原重工股份有限公司 | Hydraulic pre-tightening tool |
| CN105108471A (en) * | 2015-09-23 | 2015-12-02 | 中国重型机械研究院股份公司 | Adjustable pretightening and fixing device |
| CN106475509A (en) * | 2016-12-05 | 2017-03-08 | 重集团大连设计研究院有限公司 | A kind of large-scale combined hydraulic press frame structure for being capable of constantly pretension |
| CN113195167A (en) * | 2018-12-21 | 2021-07-30 | 卡特彼勒能源方案有限公司 | Device for tensioning a connecting element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: QINGDAO HONGDA FORGING MACHINERY CO., LTD. Free format text: FORMER OWNER: SHEN JUAN Effective date: 20090814 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090814 Address after: No. 297, Guangzhou North Road, Shandong, Jiaozhou Province, China: 266300 Patentee after: Qingdao Hongda Forging Machinery Co., Ltd. Address before: No. 297, Guangzhou North Road, Shandong, Jiaozhou Province, China: 266300 Co-patentee before: Liu Yuhui Patentee before: Juan Juan |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20130807 |