CN205503685U - A word bolt that has adjustable pretension function based on magnetic current becomes effect - Google Patents
A word bolt that has adjustable pretension function based on magnetic current becomes effect Download PDFInfo
- Publication number
- CN205503685U CN205503685U CN201620173027.5U CN201620173027U CN205503685U CN 205503685 U CN205503685 U CN 205503685U CN 201620173027 U CN201620173027 U CN 201620173027U CN 205503685 U CN205503685 U CN 205503685U
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- CN
- China
- Prior art keywords
- bolt
- pretightning force
- connecting piece
- shank
- solenoid
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Abstract
The utility model relates to a word bolt that has adjustable pretension function based on magnetic current becomes effect. Regulation control magnetic current grow degree for thereby adjust the pretightning force satisfy have that specific pretightning force requires by the occasion of connecting piece. The device is including bolt head, spout, shank of bolt, magnetorheological suspensions, cage ring, volume -compensating ware, solenoid, sealing washer, piston, SLIP RING, reset spring. After confirming by the best initial pretension force F0 of connecting piece, thereby adjust the electric current size adjustment magnetorheological suspensions's that flows into solenoid rheology intensity, magnetorheological suspensions's shear yield stress is stable at the best initial pretension force F0 by the connecting piece the most at last, then screw the nut makes SLIP RING take place minor removal, has finally confirmed should do all can to the best pretightning force F0 by the connecting piece. The device connects is not needed to add in addition the pretightning force detection behind the connecting piece, the process of screwing up is exactly the process that the pretightning force detected, convenient operation, high, the labour saving and time saving of precision.
Description
Technical field
This utility model relates to a word bolt with adjustable pretension function, especially relates to a kind of based on magnetic rheology effect have adjustable pretension function
A word bolt.
Background technology
All must tighten when the overwhelming majority is threaded in assembling, before making to be connected to bear service load, be previously subjected to the effect of pretightning force, mesh ground
It is to increase the reliability connected and compactness, with connected piece after preventing stand under load, gap occurs or Relative sliding occurs.Fact proved bigger pretension
Power is all favourable to the fatigue strength of threaded reliability and connected piece, especially for as cylinder head, line flange, gear-box, axle
Holding the compactness such as lid and require higher threaded, pretension is even more important.But the physical dimension that excessive pretightning force can cause whole connection increases, also
Connector can be made to be pulled off when assembling or accidentally overload.Therefore, in order to ensure to connect required pretightning force, the most do not make threaded connector transship,
For important threaded, when assembling it is noted that control pretightning force.
At present, the method controlling pretightning force is a lot, it is common that by measuring spanner for force moment or torque wrench, utilizes the method controlling screw-down torque to control
The size of pretightning force processed, the operation principle of measuring spanner for force moment is according to the spring element on spanner, produced elastic deformation under the effect of screwing force
Indicate the size of screw-down torque.Although the method is simple to operate, but in the case of outside environmental change is big, the physical characteristic of load-sensing unit with
Change big, precision is difficult to ensure that, therefore, it is difficult to be applied to high-accuracy mechanical assembly occasion.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of word bolt with adjustable pretension function based on magnetic rheology effect, and this device is not
Easily it is affected by, there is precision high, the features such as the life-span is long, compact conformation, it is particularly suitable for the assembling of high-accuracy frame for movement.
In order to effectively realize the feature described above of a kind of word bolt with adjustable pretension function based on magnetic rheology effect, this utility model is
Realize as follows: this device is by bolt head, chute, shank of bolt, magnetic flow liquid, cage ring, pressurizer, solenoid,
Sealing ring, piston, sliding gasket, back-moving spring forms.On shank of bolt, half-section has chamber, and chamber is by four chutes outputed on shank of bolt
Being connected with extraneous air, sliding gasket sets up sliding pair by four chutes and shank of bolt, and is connected with bolt head by back-moving spring, piston upper
Having groove, solenoid is wound in this groove, and piston is connected with sliding gasket, and drives it to move by sliding gasket, and pressurizer is installed
In the bottom of chamber, shank of bolt, piston, pressurizer, sealing ring form a cavity closed, and magnetic flow liquid is filled in this and seals cavity,
And by cage ring, magnetic flow liquid is isolated with solenoid.
Determining optimal initial pretightning force F of connected piece0After, regulation flows into the size of current of solenoid thus to adjust the rheology of magnetic flow liquid strong
Degree, the most at last stable optimal initial pretightning force F at connected piece of the shear yield stress of magnetic flow liquid0, then tightening nut makes sliding gasket send out
Raw small movement, finally determines the optimum preload F that this power is connected piece0.This device need not after connecting connected piece separately add pretightning force inspection
Survey device detects, and the process tightened is exactly the process of pretightning force detection.
The having the active effect that of a kind of word bolt with adjustable pretension function based on magnetic rheology effect described in the utility model utilizes magnetorheological
Liquid have reaction rapidly, continuously, reversible, shear yield stress is high, consume energy the feature such as low, magnetic flow liquid and bolt body is combined, design
A kind of word bolt with integrated adjustable pretension function.Magnetic flow liquid volume required in whole device is small, and (size according to bolt used is true
Fixed, typically between 0.5mL-5mL), and shear yield stress can reach 300Mp, operating temperature can between-20 DEG C-150 DEG C steady operation,
Therefore, this device is difficult to be affected by, and has precision high, and the features such as the life-span is long, compact conformation are particularly suitable for high-accuracy machine
The assembling of tool structure.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of a kind of word bolt with adjustable pretension function based on magnetic rheology effect.
Fig. 2 is the external structure schematic diagram of a kind of word bolt with adjustable pretension function based on magnetic rheology effect.
Detailed description of the invention
With embodiment, this utility model is further described below in conjunction with the accompanying drawings.
In conjunction with Fig. 1 and Fig. 2, a kind of word bolt with adjustable pretension function based on magnetic rheology effect of this utility model, this device is by bolt
1, chute 2, shank of bolt 3, magnetic flow liquid 4, cage ring 5, pressurizer 6, solenoid 7, sealing ring 9, piston 10, sliding mats
Circle 11, back-moving spring 12 form.Its internal structure is: on shank of bolt 3, half-section has chamber, and chamber passes through four outputed on shank of bolt 3
Chute 2 is connected with extraneous air, and sliding gasket 11 sets up sliding pair by four chutes 2 and shank of bolt 3, and by back-moving spring 12 and bolt
1 connects, and has groove above piston 10, and solenoid 7 is wound in this groove, and piston 10 is connected with sliding gasket 11, and by sliding
Packing ring 11 drives it to move, and pressurizer 6 is arranged on the bottom of chamber, and shank of bolt 3, piston 10, pressurizer 6, sealing ring 9 form
One cavity closed, magnetic flow liquid 4 is filled in this and seals cavity, and isolated with solenoid 7 by magnetic flow liquid 4 by cage ring 5.
Utilize magnetic flow liquid 4 have reaction rapidly, continuously, reversible, shear yield stress is high, consume energy the feature such as low, by magnetic flow liquid 4 and bolt
Body is combined, and designs a kind of word bolt with integrated adjustable pretension function.The magnetic flow liquid 4 small (root of volume required in whole device
Determine according to the size of bolt used, typically between 0.5mL-5mL), and shear yield stress can reach 300Mp, operating temperature can be at-20 DEG C
Steady operation between-150 DEG C, therefore, this device is difficult to be affected by, and has precision high, and the features such as the life-span is long, compact conformation are special
It is not suitably applied the assembling of high-accuracy frame for movement.
Determining optimal initial pretightning force F of connected piece0After, regulation flows into the size of current of solenoid 7 thus changes magnetic flow liquid 4 place sky
Between the size in magnetic field 8, and then adjust the Rheological strength of magnetic flow liquid 4, the shear yield stress of magnetic flow liquid 4 is stable at connected piece the most at last
Optimal initial pretightning force F0, then tightening nut makes sliding gasket 11 that small movement occur, and finally determining this power is the optimal of connected piece
Pretightning force F0.This device need not after connecting connected piece separately add the detection of pretension force checking device, and the process tightened is exactly the process of pretightning force detection.
Claims (1)
1. a word bolt with adjustable pretension function based on magnetic rheology effect, device be by bolt head, chute, shank of bolt, magnetic flow liquid, every
From circle, pressurizer, solenoid, sealing ring, piston, sliding gasket, back-moving spring composition；It is characterized in that: described shank of bolt (3)
Upper half-section has chamber, described chamber by four chutes (2) outputing on shank of bolt (3) be connected externally to, described sliding gasket (11)
Set up sliding pair by four chutes (2) and shank of bolt (3), and be connected with bolt head (1) by back-moving spring (12), described piston (10)
Having groove, solenoid (7) is wound on this groove, and piston (10) is connected with sliding gasket (11), and is driven by sliding gasket (11)
It moves, and described pressurizer (6) is arranged on the bottom of chamber, described shank of bolt (3), piston (10), pressurizer (6), sealing
Circle (9) forms a cavity closed, and described magnetic flow liquid (4) is filled in this and seals cavity, and by cage ring (5) by magnetic flow liquid
(4) isolate with solenoid (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620173027.5U CN205503685U (en) | 2016-03-02 | 2016-03-02 | A word bolt that has adjustable pretension function based on magnetic current becomes effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620173027.5U CN205503685U (en) | 2016-03-02 | 2016-03-02 | A word bolt that has adjustable pretension function based on magnetic current becomes effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205503685U true CN205503685U (en) | 2016-08-24 |
Family
ID=56726879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620173027.5U Expired - Fee Related CN205503685U (en) | 2016-03-02 | 2016-03-02 | A word bolt that has adjustable pretension function based on magnetic current becomes effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205503685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545912A (en) * | 2016-03-02 | 2016-05-04 | 孙美娜 | Magnetorheological-effect-based line-shaped bolt with pretightening force adjusting function |
-
2016
- 2016-03-02 CN CN201620173027.5U patent/CN205503685U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545912A (en) * | 2016-03-02 | 2016-05-04 | 孙美娜 | Magnetorheological-effect-based line-shaped bolt with pretightening force adjusting function |
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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: 20160824 Termination date: 20170302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |