CN203756703U - Prestress large hydraulic locking nut device - Google Patents
Prestress large hydraulic locking nut device Download PDFInfo
- Publication number
- CN203756703U CN203756703U CN201420163104.XU CN201420163104U CN203756703U CN 203756703 U CN203756703 U CN 203756703U CN 201420163104 U CN201420163104 U CN 201420163104U CN 203756703 U CN203756703 U CN 203756703U
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- CN
- China
- Prior art keywords
- nut body
- hydraulic
- hydraulic nut
- ring
- piston ring
- 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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Abstract
The utility model provides a prestress large hydraulic locking nut device which comprises a hydraulic nut body, an inner sealing ring, an outer sealing ring, a piston ring, two semicircular hollow gaskets and a stud, an inner sealing groove, a spanner groove, an oil cavity and an oil inlet hole are formed in the hydraulic nut body, the inner sealing ring is arranged on the inner sealing groove of the hydraulic nut body, the piston ring is arranged in the oil cavity of the hydraulic nut body in a movable fit manner, an outer sealing groove is formed in the outer ring surface of the piston ring, the outer sealing ring is arranged on the outer sealing groove of the piston ring, the two symmetrically placed semicircular hollow gaskets are arranged on the bottom end face of the hydraulic nut body, and a threaded portion of the stud is connected with an internal thread of the hydraulic nut body after an unthreaded portion of the stud penetrates an upper locking part and a lower locking part. The prestress large hydraulic locking nut device has the advantages that the device is simple in structure, safe and reliable, time and labor are saved, and technically required stud pre-tightening force is easily achieved.
Description
Technical field
The utility model relates to a kind of prestressed large hydraulic locking nut device, belongs to field of mechanical technique.
Background technique
the locking that double-screw bolt is connected, all generally to use all kinds of spanners to screw nut to carry out, but tighten large-scale nuts more than diameter 120 ㎜, common wrench is not gathered effect, only have special one spanner, mix again extension lever, screw nut by several able-bodied labours, sometimes still do not gather effect, only at nut outer side surface, spanner groove is set, impact or clash into nut with percussion hammer with iron hammer, make it slow circumvolve and fastening, and also to be assigned at double-screw bolt and carry out the fastening of nut without screw thread position local heating, the method of all these tightening nuts, distortion and damage are brought to nut and double-screw bolt in capital, operator's labor intensity is large, efficiency is low, dangerous, and be difficult to reach the double-screw bolt pretightening force of technical requirements, sometimes be limited to spatial position, said method also cannot be implemented.
Summary of the invention
The purpose of this utility model is just to provide a kind of prestressed large hydraulic locking nut device, for addressing the above problem.
The technical solution of the utility model is: a kind of prestressed large hydraulic locking nut device, comprise hydraulic nut body, inner seal ring, exterior seal ring, piston ring, the hollow pad of semicircle and double-screw bolt, interior seal groove is set on hydraulic nut body, spanner groove, oil pocket and oil inlet hole, on the interior seal groove of hydraulic nut body, inner seal ring is set, piston ring is arranged on to move fit system in the oil pocket of hydraulic nut body, the outer ring surface of piston ring is provided with external sealed groove, on the external sealed groove of piston ring, exterior seal ring is set, two symmetrical hollow pads of semicircle of placing are set on hydraulic nut body bottom end, double-screw bolt unthreaded portion passes after upper locking element and lower locking element, it has the internal thread of helical thread portion and hydraulic nut body to be connected.
The beneficial effects of the utility model are: double-screw bolt pretightening force simple in structure, safe and reliable, time saving and energy saving, easily to reach technical requirements.
Brief description of the drawings
Fig. 1 is the utility model assembly structure schematic diagram.
Embodiment
Known with reference to accompanying drawing 1, a kind of prestressed large hydraulic locking nut device, comprise hydraulic nut body 1, inner seal ring 2, exterior seal ring, piston ring 4, the hollow pad 5 of semicircle and double-screw bolt 8, interior seal groove is set on hydraulic nut body 1, spanner groove, oil pocket and oil inlet hole, on the interior seal groove of hydraulic nut body 1, inner seal ring 2 is set, piston ring 4 is arranged on to move fit system in the oil pocket of hydraulic nut body 1, the outer ring surface of piston ring 4 is provided with external sealed groove, on the external sealed groove of piston ring 4, exterior seal ring 3 is set, two symmetrical hollow pads 5 of semicircle of placing are set on hydraulic nut body 1 bottom end, double-screw bolt 8 unthreaded portions pass after upper locking element 7 and lower locking element 6, it has the internal thread of helical thread portion and hydraulic nut body 1 to be connected.In locking process, first use on the spanner groove of hydraulic nut body 1 with manpower after extension lever tightens hydraulic nut body 1 as possible, again the oil inlet hole of pressure oil pump and hydraulic nut body 1 is coupled together with pipeline, open oil pump, stress between hydraulic nut body 1 and piston ring 4, along with oil pressure rises, piston ring 4 rises gradually, due to hydraulic nut body 1 by thread lock on double-screw bolt 8, so double-screw bolt 8 unthreaded portions are forced to downward elongation, now hydraulic nut body 1 and had a gap between casting die 6 down, when double-screw bolt 8 elongates while reaching the pretightening force of technical requirements to appropriate location within the scope of limit of elasticity, rapidly hydraulic nut body 1 and lower by casting die 6 between pad on two hollow pads 5 of semicircle, and its point is welding as one, remove pressure oil pump pressure, locking work has just been accused.
Claims (1)
1. a prestressed large hydraulic locking nut device, comprise hydraulic nut body (1), inner seal ring (2), exterior seal ring (3), piston ring (4), the hollow pad of semicircle (5) and double-screw bolt (8), it is characterized in that: hydraulic nut body (1) is provided with interior seal groove, spanner groove, oil pocket and oil inlet hole, inner seal ring (2) is set on the interior seal groove of hydraulic nut body (1), piston ring (4) is arranged on to move fit system in the oil pocket of hydraulic nut body (1), the outer ring surface of piston ring (4) is provided with external sealed groove, exterior seal ring (3) is set on the external sealed groove of piston ring (4), two symmetrical hollow pads of semicircle (5) of placing are set on hydraulic nut body (1) bottom end, double-screw bolt (8) unthreaded portion passes after upper locking element (7) and lower locking element (6), it has the internal thread of helical thread portion and hydraulic nut body (1) to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420163104.XU CN203756703U (en) | 2014-04-04 | 2014-04-04 | Prestress large hydraulic locking nut device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420163104.XU CN203756703U (en) | 2014-04-04 | 2014-04-04 | Prestress large hydraulic locking nut device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203756703U true CN203756703U (en) | 2014-08-06 |
Family
ID=51251984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420163104.XU Expired - Fee Related CN203756703U (en) | 2014-04-04 | 2014-04-04 | Prestress large hydraulic locking nut device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203756703U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564983A (en) * | 2014-12-10 | 2015-04-29 | 马鞍山市益华液压机具有限公司 | Bottom ring hydraulic nut |
| CN105465140A (en) * | 2014-09-03 | 2016-04-06 | 天津市天锻压力机有限公司 | Self-pretightening hydraulic lock nut for large-scale superplastic forming press |
| CN110259597A (en) * | 2019-06-21 | 2019-09-20 | 钟建斌 | A kind of new Joining Structure between valve mechanism cover and cylinder head |
| CN111120490A (en) * | 2019-12-13 | 2020-05-08 | 扬力集团股份有限公司 | Hydraulic pre-tightening nut for combined machine body of press machine |
-
2014
- 2014-04-04 CN CN201420163104.XU patent/CN203756703U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465140A (en) * | 2014-09-03 | 2016-04-06 | 天津市天锻压力机有限公司 | Self-pretightening hydraulic lock nut for large-scale superplastic forming press |
| CN104564983A (en) * | 2014-12-10 | 2015-04-29 | 马鞍山市益华液压机具有限公司 | Bottom ring hydraulic nut |
| CN110259597A (en) * | 2019-06-21 | 2019-09-20 | 钟建斌 | A kind of new Joining Structure between valve mechanism cover and cylinder head |
| CN111120490A (en) * | 2019-12-13 | 2020-05-08 | 扬力集团股份有限公司 | Hydraulic pre-tightening nut for combined machine body of press machine |
| CN111120490B (en) * | 2019-12-13 | 2021-09-14 | 扬力集团股份有限公司 | Hydraulic pre-tightening nut for combined machine body of press machine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20190404 |