CN105570263A - Outer hexagonal bolt with adjustable pre-tightening function based on magneto-rheological effect - Google Patents
Outer hexagonal bolt with adjustable pre-tightening function based on magneto-rheological effect Download PDFInfo
- Publication number
- CN105570263A CN105570263A CN201610127535.4A CN201610127535A CN105570263A CN 105570263 A CN105570263 A CN 105570263A CN 201610127535 A CN201610127535 A CN 201610127535A CN 105570263 A CN105570263 A CN 105570263A
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- China
- Prior art keywords
- magneto
- bolt
- tightening force
- hexagonal bolt
- outer hexagonal
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- 230000000694 effects Effects 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 20
- 238000000518 rheometry Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention relates to an outer hexagonal bolt with an adjustable pre-tightening function based on a magneto-rheological effect, and the outer hexagonal bolt is used for regulating and controlling magneto-rheological strength, and regulating pre-tightening force to meet the occasion of a connected part with special pre-tightening force requirements. The outer hexagonal bolt comprises a bolt head, slide slots, a bolt rod, a magneto-rheological fluid, an isolating ring, a volume compensator, an electromagnetic coil, a sealing ring, a piston, a slide gasket and return springs. According to the outer hexagonal bolt, after determining the optimal initial pre-tightening force F0 of the connected part, the size of current which flows into the electromagnetic coil is regulated to regulate the magneto-rheological strength of the magneto-rheological fluid, so that shear yield stress of the magneto-rheological fluid is stabilized at the optimal initial pre-tightening force F0 of the connected part; and a nut is rotated for enabling the slide gasket to generate small movement, so that the force is finally determined as the optimal initial pre-tightening force F0 of the connected part. After being connected to the connector part, the outer hexagonal bolt does not need additional pre-tightening force detection; and a tightening process is a pre-tightening force detecting process, so that the operation is convenient, the precision is high, and the time and the labor are saved.
Description
Technical field
The present invention relates to the outer-hexagonal bolt with adjustable pretension function, especially relate to a kind of outer-hexagonal bolt with adjustable pretension function based on magnetic rheology effect.
Background technique
The overwhelming majority must tighten when being threaded in assembling, before making to be connected to and bearing work loads, is subject to the effect of pretightening force in advance, is to increase the reliability and tightness that connect order, occurs gap with connected piece after preventing stand under load or Relative sliding occurs.Fact proved that the larger reliability of pretightening force double thread connection and the fatigue strength of connected piece are all favourable, require higher being threaded for as tightnesses such as cylinder head, line flange, gear-box, bearing caps especially, pretension is even more important.But excessive pretightening force can cause the physical dimension of whole connection to increase, link also can be made to be pulled off when assembling or accidentally transship.Therefore, in order to ensure the pretightening force required for connection, not making again threaded connector transship, important is threaded, wanting attentional manipulation pretightening force when assembling.
At present, the method controlling pretightening force is a lot, normally by measuring spanner for force moment or torque wrench, the method controlling screw-down torque is utilized to control the size of pretightening force, the working principle of measuring spanner for force moment is according to the spring element on spanner, and the resiliently deformable produced under the effect of screwing force is to indicate the size of screw-down torque.Although the method is simple to operate, when outside environmental change is large, the physical property of dynamometer element changes greatly thereupon, and precision is difficult to ensure, therefore, is difficult to be applied to high-accuracy Automatic manual transmission occasion.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of outer-hexagonal bolt with adjustable pretension function based on magnetic rheology effect, this device is not subject to the impact of external environment condition, has precision high, and the life-span is long, the features such as compact structure, are particularly suitable for the assembling of high-accuracy mechanical structure.
In order to effectively realize a kind of feature described above with the outer-hexagonal bolt of adjustable pretension function based on magnetic rheology effect, the present invention realizes as follows: this device is by bolt head, chute, bolt shank, magnetic flow liquid, cage ring, pressurizer, electromagnetic coil, seal ring, piston, sliding gasket, Returnning spring forms.On bolt shank, half-section has chamber, chamber is connected with outside air by four chutes outputed on bolt shank, sliding gasket sets up sliding pair by four chutes and bolt shank, and be connected with bolt head by Returnning spring, groove is had above piston, electromagnetic coil is around in this groove, piston and sliding gasket are connected, and drive it to move by sliding gasket, pressurizer is arranged on the bottom of chamber, bolt shank, piston, pressurizer, seal ring forms a closed cavity, magnetic flow liquid is filled in this seal chamber, and by cage ring, magnetic flow liquid and electromagnetic coil are isolated.
Determining the initial pretightening force F of the best of connected piece
0after, regulate the size of current thus the Rheological strength of adjustment magnetic flow liquid that flow into electromagnetic coil, the shear yield stress of magnetic flow liquid is stabilized in the initial pretightening force F of the best of connected piece the most at last
0, then tightening nut makes sliding gasket that small movement occur, and finally determines the optimum preload F that this power is connected piece
0.This device does not need separately to add pretightening force detection device and detects after connecting connected piece, the process of tightening is exactly the process that pretightening force detects.
A kind of good effect with the outer-hexagonal bolt of adjustable pretension function based on magnetic rheology effect of the present invention is: utilize magnetic flow liquid have reaction rapidly, continuously, reversible, shear yield stress is high, consume energy the feature such as low, magnetic flow liquid and bolt body are combined, designs a kind of outer-hexagonal bolt with integrated adjustable pretension function.Magnetic flow liquid volume required in whole device is small, and (size according to bolt used is determined, general between 0.5mL-5mL), and shear yield stress can reach 300Mp, operating temperature can between-20 DEG C-150 DEG C stable operation, therefore, this device is not subject to the impact of external environment condition, there is precision high, the features such as the life-span is long, compact structure, are particularly suitable for the assembling of high-accuracy mechanical structure.
Accompanying drawing explanation
Fig. 1 is a kind of internal structure schematic diagram with the outer-hexagonal bolt of adjustable pretension function based on magnetic rheology effect.
Fig. 2 is a kind of external structure schematic diagram with the outer-hexagonal bolt of adjustable pretension function based on magnetic rheology effect.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in more detail.
Composition graphs 1 and Fig. 2, a kind of outer-hexagonal bolt with adjustable pretension function based on magnetic rheology effect of the present invention, this device is made up of bolt head 1, chute 2, bolt shank 3, magnetic flow liquid 4, cage ring 5, pressurizer 6, electromagnetic coil 7, seal ring 9, piston 10, sliding gasket 11, Returnning spring 12.Its internal structure is: on bolt shank 3, half-section has chamber, chamber is connected with outside air by four chutes 2 outputed on bolt shank 3, sliding gasket 11 sets up sliding pair by four chutes 2 and bolt shank 3, and be connected with bolt head 1 by Returnning spring 12, piston 10 has groove above, electromagnetic coil 7 is around in this groove, piston 10 and sliding gasket 11 are connected, and drive it to move by sliding gasket 11, pressurizer 6 is arranged on the bottom of chamber, bolt shank 3, piston 10, pressurizer 6, seal ring 9 forms a closed cavity, magnetic flow liquid 4 is filled in this seal chamber, and by cage ring 5, magnetic flow liquid 4 and electromagnetic coil 7 are isolated.
Utilize magnetic flow liquid 4 have reaction rapidly, continuously, reversible, shear yield stress is high, consume energy the feature such as low, magnetic flow liquid 4 and bolt body are combined, design a kind of outer-hexagonal bolt with integrated adjustable pretension function.Magnetic flow liquid 4 volume required in whole device is small, and (size according to bolt used is determined, general between 0.5mL-5mL), and shear yield stress can reach 300Mp, operating temperature can between-20 DEG C-150 DEG C stable operation, therefore, this device is not subject to the impact of external environment condition, there is precision high, the features such as the life-span is long, compact structure, are particularly suitable for the assembling of high-accuracy mechanical structure.
Determining the initial pretightening force F of the best of connected piece
0after, regulate the size of current thus the size of change magnetic flow liquid 4 place space magnetic field 8 that flow into electromagnetic coil 7, and then the Rheological strength of adjustment magnetic flow liquid 4, the shear yield stress of magnetic flow liquid 4 is stabilized in the initial pretightening force F of the best of connected piece the most at last
0, then tightening nut makes sliding gasket 11 that small movement occur, and finally determines the optimum preload F that this power is connected piece
0.This device does not need separately to add pretightening force detection device and detects after connecting connected piece, the process of tightening is exactly the process that pretightening force detects.
Claims (1)
1., based on an outer-hexagonal bolt with adjustable pretension function for magnetic rheology effect, device is made up of bolt head, chute, bolt shank, magnetic flow liquid, cage ring, pressurizer, electromagnetic coil, seal ring, piston, sliding gasket, Returnning spring, it is characterized in that: the upper half-section of described bolt shank (3) has chamber, described chamber is connected with outside by four chutes (2) outputed on bolt shank (3), described sliding gasket (11) sets up sliding pair by four chutes (2) and bolt shank (3), and be connected with bolt head (1) by Returnning spring (12), described piston (10) has groove, electromagnetic coil (7) is around this groove, piston (10) and sliding gasket (11) are connected, and drive it to move by sliding gasket (11), described pressurizer (6) is arranged on the bottom of chamber, described bolt shank (3), piston (10), pressurizer (6), the cavity that seal ring (9) composition one is closed, described magnetic flow liquid (4) is filled in this seal chamber, and by cage ring (5), magnetic flow liquid (4) and electromagnetic coil (7) are isolated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127535.4A CN105570263A (en) | 2016-03-02 | 2016-03-02 | Outer hexagonal bolt with adjustable pre-tightening function based on magneto-rheological effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127535.4A CN105570263A (en) | 2016-03-02 | 2016-03-02 | Outer hexagonal bolt with adjustable pre-tightening function based on magneto-rheological effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105570263A true CN105570263A (en) | 2016-05-11 |
Family
ID=55880758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610127535.4A Pending CN105570263A (en) | 2016-03-02 | 2016-03-02 | Outer hexagonal bolt with adjustable pre-tightening function based on magneto-rheological effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105570263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183626A (en) * | 2018-01-08 | 2018-06-19 | 中北大学 | Power generation screw based on magnetoelectricity-Piezoelectric anisotropy formula structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6318519B1 (en) * | 1999-09-13 | 2001-11-20 | Delphi Technologies, Inc. | Magnetorheological fluid damper tunable for smooth transitions |
| CN103674530A (en) * | 2013-12-06 | 2014-03-26 | 上海应用技术学院 | Device for testing performance of magnetorheological fluid damper |
| CN203773691U (en) * | 2014-03-09 | 2014-08-13 | 浙江师范大学 | Selective alarm device based on magnetorheological fluid |
| CN104421294A (en) * | 2013-08-27 | 2015-03-18 | 常州市永达紧固件有限公司 | Connecting bolt |
| CN204800531U (en) * | 2015-05-26 | 2015-11-25 | 孙美娜 | Outer hexagonal screw sword that has location antiskid function based on magnetic current becomes effect |
| CN205503684U (en) * | 2016-03-02 | 2016-08-24 | 孙美娜 | Outer hex bolts that has adjustable pretension function based on magnetic current becomes effect |
-
2016
- 2016-03-02 CN CN201610127535.4A patent/CN105570263A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6318519B1 (en) * | 1999-09-13 | 2001-11-20 | Delphi Technologies, Inc. | Magnetorheological fluid damper tunable for smooth transitions |
| CN104421294A (en) * | 2013-08-27 | 2015-03-18 | 常州市永达紧固件有限公司 | Connecting bolt |
| CN103674530A (en) * | 2013-12-06 | 2014-03-26 | 上海应用技术学院 | Device for testing performance of magnetorheological fluid damper |
| CN203773691U (en) * | 2014-03-09 | 2014-08-13 | 浙江师范大学 | Selective alarm device based on magnetorheological fluid |
| CN204800531U (en) * | 2015-05-26 | 2015-11-25 | 孙美娜 | Outer hexagonal screw sword that has location antiskid function based on magnetic current becomes effect |
| CN205503684U (en) * | 2016-03-02 | 2016-08-24 | 孙美娜 | Outer hex bolts that has adjustable pretension function based on magnetic current becomes effect |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183626A (en) * | 2018-01-08 | 2018-06-19 | 中北大学 | Power generation screw based on magnetoelectricity-Piezoelectric anisotropy formula structure |
| CN108183626B (en) * | 2018-01-08 | 2019-04-30 | 中北大学 | Power generation screw based on magnetoelectric-piezoelectric composite structure |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20160511 |