CN2169724Y - Device for hydraulic tensioning bolt and hydraulic tightening nut - Google Patents
Device for hydraulic tensioning bolt and hydraulic tightening nut Download PDFInfo
- Publication number
- CN2169724Y CN2169724Y CN 93211002 CN93211002U CN2169724Y CN 2169724 Y CN2169724 Y CN 2169724Y CN 93211002 CN93211002 CN 93211002 CN 93211002 U CN93211002 U CN 93211002U CN 2169724 Y CN2169724 Y CN 2169724Y
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- Prior art keywords
- nut
- bolt
- sliding machine
- oil cylinder
- sliding
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 41
- 230000000694 effects Effects 0.000 description 3
- 239000010721 machine oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses a device for hydraulic tensioning screw bolt and hydraulic tightening screw nut, belonging to the technical field of mechanical assembly tools. The device comprises a tensioning screw bolt mechanism and a tightening screw nut mechanism. The tensioning screw bolt mechanism is composed of a tensioning screw nut, an oil cylinder and a piston. The tightening screw nut mechanism is composed of a gear, a spring, a slide machine, etc. The screw bolt of a connecting workpiece is tensioned within the elastic range by making use of the superhigh pressure oil and then the high pressure oil drives the slide machine device to tightly screw or loosen the screw nut. The force of the screw bolt is relevant to the superhigh pressure oil pressure and the high pressure oil pressure and can be accurately controlled. The same oil pressure is adopted to tension a plurality of screw bolts to make each force of the screw bolt and the torsional force are uniform and consistent.
Description
The utility model relates to the device of a kind of hydraulic tensioning bolt, hydraulic pressure degree of tightness nut, belongs to mechanical assembly tool technical field.
Existing nut installation method mainly is manual wrench (it is following to be generally M20), hydraulic pressure or other power wrench (it is following to be generally M48) and simple and easy torque tool such as lever, capstan winch (being generally more than the M32).The common feature of these instruments be with mechanical force moment with nut screwing clamping or unclamp, its shortcoming is: torsional moment is big, the operation effort; Bolt force is difficult to accurate control; Many bolts are difficult to realize the even, consistent of each bolt force and torsional moment when connecting; Double thread and fastening surface also can bring damage.At above problem, domesticly once designed a kind of improved hydraulic tensioning bolt fastening nut device, the patent No. is CN87202153U, its structure as shown in Figure 1, this device uses handle with nut screwing clamping.Mainly solved the problem of rapid operation when the M30-M64 bolt is twisted, its shortcoming is accurately to control bolt force and torsional moment, in the time of can not guaranteeing a plurality of bolt simultaneous tension, and bolt force and torsional moment uniformity.
The purpose of this utility model is design and makes a kind of hydraulic tensioning bolt, hydraulic pressure fastening nut device, it not only rapid operation, do not damage screw thread and fastener surface, and can accurately control bolt force, make each bolt force and to twist moment even, consistent.
Content of the present utility model is: the device of hydraulic tensioning bolt, hydraulic pressure degree of tightness nut is made up of stretch-draw bolt mechanism and degree of tightness nut body.The stretch-draw bolt mechanism is made up of tensioning nut, oil cylinder, piston and oil nozzle.Tensioning nut is screwed on the clamping bolt, and piston places in the oil cylinder, and piston top is the position oil cylinder once, and oil nozzle leads to oil cylinder.The degree of tightness nut body comprises gear, attachment bolt, tightens sliding machine and unclamps sliding machine.Attachment bolt joins together with gear with by the degree of tightness nut, tightens sliding machine and unclamps the both sides that sliding machine places cylinder body respectively, and sliding machine is made up of spring, sliding machine bar, plectrum, sliding Oil cylinder.Sliding machine bar places in the sliding Oil cylinder, and plectrum is at sliding machine boom end, and an end of plectrum is meshed with gear, and there is oil nozzle sliding Oil cylinder end.
The basic functional principle of this device is to utilize the ultrahigh pressure oil pressure will connect bolt stretch-draw in elastic range of workpiece, then with the moving sliding machine of high pressure oil pressure zone with nut screwing clamping or unclamp.After super high pressure oil and the high pressure oil unloading, for the fastening nut situation, bolt and nut connects workpiece fastening; For unclamping nut case, bolt restores, the no longer fastening workpiece of nut.Bolt force and ultrahigh pressure oil pressure and high pressure oil are pressed with the pass, can accurately control; Adopt same ultrahigh pressure oil pressure and high pressure oil pressure during a plurality of bolt stretch-draw, can make each bolt force and torsional moment uniformity.
Description of drawings:
Fig. 1 is the prior art structure principle chart.
Fig. 2 is the utility model structure principle chart.
Fig. 3 is that the A-A of Fig. 2 is to sectional view.
Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.Among Fig. 2 and Fig. 3, the 1st, tensioning nut, the 2nd, piston, the 3rd, by the stretch-draw bolt, the 4th, cylinder body, the 5th, unclamp sliding machine, the 6th, gear, the 7th, by the degree of tightness nut, the 8th, fastened workpiece, the 9th, return oil cylinder, the 10th, oil cylinder, the 11st, pole, the 12nd, sealing gasket, the 13rd, oil nozzle, the 14th, spring, the 15th, tighten sliding machine, the 16th, plectrum, the 17th, indicating wheel, the 18th, spring, the 19th, sliding machine bar, the 20th, attachment bolt, the 21st, sliding Oil cylinder, the 22.th, sliding machine oil mouth.
The working procedure of this device is achieved in that the super high pressure oil (pressure maximum is 150MPa) of high pressure oil pump, enter in the oil cylinder cavity 10 by oil nozzle 13, piston 2 moves up under the effect of ultrahigh pressure oil pressure, and press to tensioning nut 1 on the bolt 3, make piston 2 produce pulling force upwards and pass on the bolt 3.Because cylinder body 4 is bearing on the surface of fastening piece 8,, and make the nut that is screwed in advance on the bolt 37 and fastening piece 8 surfaces produce gaps so bolt 3 is stretched.Then, high pressure oil enters sliding Oil cylinder 21 from sliding machine oil mouth 22, promotes sliding machine bar 19 and travels forward.After the high pressure oil release, since the effect of cavity end spring 18, the motion backward of sliding machine bar 19.Like this under the alternating action of high pressure oil and spring 18, sliding machine bar 19 is reciprocating, is installed in sliding machine boom end this moment and the plectrum 16 that is meshed with gear 6 is also done corresponding to-and-fro motion, promotes gear 6 rotations.Gear 6 joins together by attachment bolt 20 with nut 7, thereby when gear 6 was rotated by plectrum 16, nut 7 was tightened, and eliminates the gap between nut 7 and the fastening piece 8.After the super high pressure oil unloading, bolt 3 retractions that are stretched just compress nut 7, and high pressure oil acts in the return oil cylinder 9 simultaneously, and piston 2 is resetted.
Sealing gasket 12, pole 11 and spring 14 play the overtravel protection effect; its working principle is: when piston 2 moves upward; spring 14 promotes pole 11 and moves upward; when piston 2 moves to predetermined stroke; super high pressure oil is pressed on sealing gasket 12 on the cylinder body by pole 11; super high pressure oil no longer flows in the oil cylinder cavity, and piston 2 moves on no longer.So just, realize overtravel protection, the stretch-draw of bolt 3 is controlled in the limited range.The characteristics of this protective gear are that this device is positioned at oil nozzle to the oil circuit of oil cylinder cavity, and when bolt was stretched to the regulation range, the ultrahigh pressure oil circuit carried automatically and ends, and bolt stops to continue stretch-draw, and keeps extended state.
The utility model has also designed the nut rotary indicating means, and this device is an indicating wheel 17 that is meshed with nut 7.When nut 7 rotates, rely on a scrolling series friction or gear transmission, drive indicating wheel 17 and rotate, thereby indicate the angle that nut turns over.
This device can be tightened the above nut of M24.Only more gear changing 6 and tensioning nut 1 get final product the nut of different size.This device both can fastening nut, can unclamp nut again.When unclamping nut, use and tighten the sliding machine structure 5 of unclamping of sliding machine structure 15 symmetries.
Claims (3)
1, the device of a kind of hydraulic tensioning bolt, hydraulic pressure degree of tightness nut is characterized in that device comprises stretch-draw bolt mechanism and degree of tightness nut body; Described stretch-draw bolt mechanism is by tensioning nut, and oil cylinder, piston and oil nozzle are formed, and tensioning nut is screwed on the fastened bolt, and piston places in the oil cylinder, and piston top is the position oil cylinder once, and oil nozzle leads to oil cylinder; Described degree of tightness nut body, comprise gear, attachment bolt, tighten sliding machine and unclamp sliding machine, attachment bolt joins together with gear with by the degree of tightness nut, tightens sliding machine and unclamps the both sides that sliding machine places cylinder body respectively, and sliding machine is made up of spring, sliding machine bar, plectrum, sliding Oil cylinder, one end of sliding machine is a spring, the other end of sliding machine places in the sliding Oil cylinder for sliding Oil cylinder, sliding machine bar, and plectrum is at sliding machine boom end, one end and the gear engagement of plectrum, there is oil nozzle the oil cylinder end.
2, device as claimed in claim 1 is characterized in that an overtravel protection device is arranged in the described stretch-draw bolt mechanism, and the overtravel protection device is made up of sealing gasket, pole, spring, and sealing gasket is at spring end, and pole connects piston and sealing gasket.
3, device as claimed in claim 1 is characterized in that being mounted with indicating wheel on the described degree of tightness nut body, and indicating wheel is meshed with described nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93211002 CN2169724Y (en) | 1993-04-29 | 1993-04-29 | Device for hydraulic tensioning bolt and hydraulic tightening nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93211002 CN2169724Y (en) | 1993-04-29 | 1993-04-29 | Device for hydraulic tensioning bolt and hydraulic tightening nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2169724Y true CN2169724Y (en) | 1994-06-22 |
Family
ID=33792746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93211002 Expired - Fee Related CN2169724Y (en) | 1993-04-29 | 1993-04-29 | Device for hydraulic tensioning bolt and hydraulic tightening nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2169724Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725210A (en) * | 2019-05-01 | 2020-01-24 | 河南交院工程技术有限公司 | Inhaul cable stepping tensioning construction method and tensioning equipment |
| CN111119961A (en) * | 2019-12-12 | 2020-05-08 | 北京科技大学 | High-prestress applying device for anchor rod and using method |
| CN111188850A (en) * | 2018-11-15 | 2020-05-22 | 通用电气公司 | Actuator fault fixing system |
| CN115030947A (en) * | 2022-05-26 | 2022-09-09 | 汪宇 | Hydraulic nut |
-
1993
- 1993-04-29 CN CN 93211002 patent/CN2169724Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188850A (en) * | 2018-11-15 | 2020-05-22 | 通用电气公司 | Actuator fault fixing system |
| CN111188850B (en) * | 2018-11-15 | 2022-05-10 | 通用电气公司 | Actuator fault fixing system |
| US11365825B2 (en) | 2018-11-15 | 2022-06-21 | General Electric Company | Actuator fail fix system |
| CN110725210A (en) * | 2019-05-01 | 2020-01-24 | 河南交院工程技术有限公司 | Inhaul cable stepping tensioning construction method and tensioning equipment |
| CN110725210B (en) * | 2019-05-01 | 2021-09-17 | 河南交院工程技术集团有限公司 | Inhaul cable stepping tensioning construction method and tensioning equipment |
| CN111119961A (en) * | 2019-12-12 | 2020-05-08 | 北京科技大学 | High-prestress applying device for anchor rod and using method |
| CN115030947A (en) * | 2022-05-26 | 2022-09-09 | 汪宇 | Hydraulic nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |