CN207924163U - A kind of loosening detection device for fastener - Google Patents
A kind of loosening detection device for fastener Download PDFInfo
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- CN207924163U CN207924163U CN201820246110.XU CN201820246110U CN207924163U CN 207924163 U CN207924163 U CN 207924163U CN 201820246110 U CN201820246110 U CN 201820246110U CN 207924163 U CN207924163 U CN 207924163U
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Abstract
The utility model provides a kind of loosening detection device for fastener, including：The first component is equipped with the first termination power；Second component is equipped with the second termination power with the complementation of the first termination power；RFID chip；When fastener is in tightening state, the first termination power is connected with the second termination power, and RFID chip is effective；When fastener is in loosening state, the first termination power is not connected to the second termination power, RFID chip failure.The loosening detection device uses the RFID chip of passive design, is easily installed replacements, at low cost, can waterproof antivibration, and it is reusable, and can it is online, diagnosis, detection efficiency height quickly and accurately are detected to fastener loosening.
Description
Technical field
The utility model is related to a kind of loosening detection devices, and dress is detected more particularly to a kind of loosening for fastener
It sets.
Background technology
Fastener is a kind of common part being widely used in the fields such as railway, vehicle, bridge, engineering equipment, is made
The influences such as vibrated in, corrosion and impact, easily cause the loosening of fastener, deformation, are broken or fall off, so as to cause equipment
Failure even major accident.Therefore, the loosening of fastener checks the big event of always engineering equipment Inspection and maintenance.
In the detection technique at home and abroad having disclosed, method comparatively outstanding has：Eyes with non-contact method and contact method.It is non-
Contact method includes mainly：Image-recognizing method and analysis of vibration signal method.
The problem of image-recognizing method is primarily present be, is only capable of judging to buckle in the case where fastener is by physical condition that dirt covers
Whether part falls off, and can not detect the elastic state of fastener, therefore cannot meet the practical need whether monitoring fastener loosens
It asks.
Analysis of vibration signal method includes mainly two classes：It is fixed structure first, needing ceaselessly to tap using percussion hammer,
It acquires simultaneously and analyzes remained shock signal；Second is that ODS (Operational Deflection Shape) mathematical model is explored,
The vibration signal that wheel passes through certain section is analyzed, artificial observation filters out the abnormal conditions of ODS values and loosens section to identify.So
And above-mentioned two classes analysis of vibration signal method is respectively present following main problem：1) when tapping hammer mechanism and develop complexity, and detecting
Limit detection speed；2) online quick diagnosis is not implemented.
Contact method includes mainly two classes：First, being manually detected using torque spanner；Second is that installing frangible RFID electronics
Label.It is respectively present following main problem：1) of high cost and less efficient；2) it when generating vibration in equipment work, easily leads
It sends a telegraph subtab fracture and generates erroneous judgement, and electronic tag is broken after threaded fastener loosens, and cannot be reused.
Therefore it provides one kind being capable of on-line quick detection and reusable fastener loosening detection device and its detection
Method become this field there is an urgent need for.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide one kind being capable of on-line quick detection and can
The fastener of reuse loosens detection device.
The utility model provides a kind of loosening detection device for fastener, including：The first component is equipped with the first coupling
Close circuit；Second component is equipped with the second termination power with the complementation of the first termination power；RFID chip；When fastener is in tight
When solid fraction state, the first termination power is connected with the second termination power, and RFID chip is effective；When fastener is in loosening state
When, the first termination power is not connected to the second termination power, RFID chip failure.
Optionally, it is respectively equipped with an at least butt contact on the first component and second component, when fastener is in fastening shape
When state, the contact point on the first component is all contacted with the contact point on second component, and the first termination power couples electricity with second
Road is connected；When fastener is in loosening state, the contact point on contact point and second component on the first component is not whole
Contact, the first termination power are not connected to the second termination power.
Optionally, when the quantity of an at least butt contact is 1, it is connected per internal contact point；When at least one docking
When the quantity of contact is 2 or more, it is connected per internal contact point, and each pair of contact point is not connected to.
Optionally, the contact point on the first component is convex contact point, and second component is recessed equipped with coordinating with convex contact point
Contact point on contact point or the first component is recessed contact point, and second component is equipped with the convex contact point coordinated with recessed contact point,
When fastener is in tightening state, all cooperation contacts convex contact point with recessed contact point；When fastener is in loosening state,
All cooperation does not contact convex contact point with recessed contact point.
Optionally, RFID chip is connected with the one pair of which contact point of the first component or second component.
Optionally, the first component and second component are equipped with pilot hole, pass through and fasten for fastener.
Optionally, the first component includes the first elastomer, and second component includes the second elastomer, the first elastomer and second
Elastomer is made of insulative water-proof material.
Optionally, the outer rim of the first elastomer is equipped with circumferential protrusion, and the outer rim of the second elastomer is equipped with convex with circumferential direction
The peripheral recess of portion's cooperation or the outer rim of the first elastomer are equipped with peripheral recess, and the outer rim of the second elastomer is equipped with and week
To the circumferential protrusion of recesses fit, circumferential protrusion generates sealing function with peripheral recess interference fit.
Optionally, it is additionally provided with fixed block on the first elastomer or the second elastomer, for placing RFID chip.
Optionally, at least the quantity of a butt contact is 2.
Optionally, fastener is threaded fastener.
Optionally, further include RFID reader, be effectively or to fail by reading RFID chip, be in obtaining fastener
Tightening state or the status information for loosening state.
Loosening detection device provided by the utility model for fastener is in tightening state or loosening by fastener
To the influence of termination power connectivity under state, and then user can be effectively or to fail from RFID chip, to judge fastener
Whether loosen.The loosening detection device can realize on-line quick detection, and repeat and used.
For the above of the utility model can be clearer and more comprehensible, spy lifts preferred embodiment, and in conjunction with attached drawing, makees detailed
It is described as follows.
Description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
Fig. 1 is the schematic diagram of the loosening detection device provided by the utility model for fastener；
Fig. 2 a are the top view of the first component；
Fig. 2 b are the vertical view of second component；
Fig. 3 is the operational flowchart of the loosening detection device provided by the utility model for fastener.
Specific implementation mode
Illustrate that the embodiment of the utility model, those skilled in the art can be by this theorys by particular specific embodiment below
The bright revealed content of book understands other advantages and effect of the utility model easily.Although the description of the utility model will tie
It closes preferred embodiment to introduce together, but this feature for not representing this utility model is only limitted to the embodiment.On the contrary, knot
It is to be possible to extend to cover based on the claim of the utility model to close the purpose that embodiment makees utility model introduction
The other selections or transformation gone out.To include many specific in order to provide the depth understanding to the utility model, in being described below
Details.The utility model can not also be implemented using these details.In addition, in order to avoid the weight of chaotic or fuzzy the utility model
Point, some details will be omitted in the de-scription.
Referring to FIG. 1, the utility model provides a kind of loosening detection device for fastener 6, including：The first component
4, second component 5 and RFID chip 1.Wherein, the first component 4 is equipped with the first termination power 2, and second component 5 is equipped with and the
The second complementary termination power 3 of one termination power 2.
When fastener 6 is in tightening state, the first termination power 2 is connected with the second termination power 3, RFID chip 1
Effectively；When fastener 6 is in loosening state, the first termination power 2 is not connected to the second termination power 3, and RFID chip 1 is lost
Effect.
It should be noted that " complementation " herein is as long as it is to be understood that the first termination power 2 and the second termination power 3
Circuit do not overlap, and the two can form complete circuit loop when fastener 6 is in tightening state.
The utility model is in tightening state by fastener 6 or loosens state to being located at the first component 4 and second component 5
The influence of the connectivity of the termination power of interior mutual complementation, and then influence the effective of RFID chip 1 or failure.User can be from
The effective or failure of RFID chip 1 is to obtain the information whether fastener 6 loosens.Therefore, which can realize
On-line quick detection, and repeat and used.
As shown in Figure 1, the loosening detection device further includes RFID reader 7, it is effectively or to lose by reading RFID chip 1
Effect, to obtain the status information that fastener 6 is in tightening state or loosening state.Specifically, RFID reader 7 can emit and
Electromagnetic wave signal is detected, when RFID chip 1 is effective, RFID reader 7 can successfully be read, and judgement fastener 6 is in fastening
State, when RFID chip 1 fails, RFID reader 7 fails reading, and judgement fastener 6 is in loosening state.
A and Fig. 2 b are please referred to Fig.2, two butt contacts are respectively equipped on the first component 4 and second component 5.Specifically, often
Internal contact point is connected, and each pair of contact point is not connected to, and each pair of contact point being connected constitutes the one of termination power
Part.
As shown in Figure 2 a, second component 5 be equipped with contact point 301,302,303 and 304, wherein contact point 301 with contact
Point 304 is connected, and constitutes a part for the second termination power 3, and contact point 302 is connected with contact point 303, constitutes the second coupling
Another part of circuit 3.A part for second termination power 3 is not connected to another part of the second termination power 3.
As shown in Figure 2 b, the first component 4 be equipped with contact point 201,202,203,204, wherein contact point 201 with contact
Point 202 is connected, and constitutes a part for the first termination power 2, and contact point 203 is connected with contact point 204, constitutes the first coupling
Another part of circuit 2.A part for first termination power 2 is not connected to another part of the first termination power 2.Wherein,
RFID chip 1 is connected with the one pair of which contact point of the first component 4, i.e., is connected with contact point 201 and contact point 202.
In other embodiments, RFID chip 1 can also be connected with other butt contacts in the first component 4 or RFID chip 1 may be used also
To be connected with the one pair of which contact point of second component 5.
When fastener 6 is in tightening state, the contact point on the first component 4 and the contact point on second component 5 are whole
Contact, i.e., contact point 201,202,203,204 is contacted with contact point 301,302,303 and 304 respectively.Due to the first termination power
2 and second the complementary of termination power 3 be arranged so that the contact point contact point corresponding on second component 5 on the first component 4
When contact, the first termination power 2 is connected with the second termination power 3, and RFID chip 1 is effective at this time.It is loosened when fastener 6 is in
When state, i.e., contact point 201,202,203,204 does not contact all with contact point 301,302,303 and 304, the first termination power
2 are not connected to the second termination power 3, and RFID chip 1 fails at this time.
It is understood that being not limited only to two butt contacts of setting on the first component 4 and second component 5, one can also be
Pair or be more than two butt contacts.As long as ensureing that the first component 4 is consistent with the logarithm that contact point on second component 5 is arranged and one is a pair of
It answers, the connected state of contact point forms complementary relationship on the connected state of contact point and second component 5 on the first component 4.
Further, the contact point on the first component 4 is convex contact point, and second component 5 is equipped with to match with convex contact point
The contact point on recessed contact point or the first component 4 closed is recessed contact point, and second component 5 is equipped with and is matched with recessed contact point
Convex contact point, when fastener 6 is in tightening state, all cooperation contacts for convex contact point and recessed contact point；At fastener 6
When the state of loosening, all cooperation does not contact convex contact point with recessed contact point.By the way that the contact point of such male-female engagement, energy is arranged
Enough so that contacting more abundant between contact point, the contact point on the first component 4 and the contact point phase mutual connection on second component 5 are avoided
It touches bad and leads to the erroneous judgement loosened.
It with reference to figure 2a and Fig. 2 b and combines shown in Fig. 1, the first component 4 and second component 5 are equipped with pilot hole, wherein the
One component 4 is equipped with the first pilot hole 403, and second component 5 is equipped with and 403 matched second pilot hole of the first pilot hole
502, it passes through and fastens for fastener 6.
Wherein, the cross section of the first component 4 and second component 5 is circle, the first pilot hole 403 and the second pilot hole 502
The center location with the first component 4 and second component 5 is respectively set.Contact point is uniformly arranged on the periphery of pilot hole.
Further, the first component 4 include the first elastomer, second component 5 include the second elastomer, the first elastomer and
Second elastomer is made of insulative water-proof material.It is understood that the first component 4 and second component 5 can be entirely to insulate
The elastomer of waterproof material can also be that elastomer only is arranged close to the side of contact surface in the first component 4 and second component 5.
After being arranged in this way, it can have the following advantages that：1) it can prevent caused by contact point is moist or surface creepage caused by short circuit
The case where loosening is failed to judge；2) when fastener 6 loosens, restored by the rebound of elastomer, make contact point on loosening position
It is detached from and disconnects, promote the sensitivity for loosening detection device, to further increase the reliability for loosening detection device；3) elastomer
It can buffer due to the vibrations that equipment works and generates, so that fastener 6 is less likely to occur to loosen.
Further, be additionally provided with circumferential protrusion 402 in the outer rim of the first elastomer, the outer rim of the second elastomer be equipped with
The peripheral recess 501 that circumferential protrusion 402 coordinates.In other implementations, it is circumferential to can also be that the outer rim of the first elastomer is equipped with
Recess portion 501, the outer rim of the second elastomer are equipped with the circumferential protrusion 402 coordinated with peripheral recess 501, circumferential protrusion 402 and week
It is interference fitted to recess portion 501 and generates sealing function.After being arranged in this way, the water proofing property for loosening detection device can be further increased
Can, it prevents external water from entering detection device and soaks the case where contact point causes short circuit, fails to judge so as to cause loosening, further carry
The high reliability for loosening detection device
Refering to what is shown in Fig. 1, fixed block 401 is additionally provided on the first elastomer, for placing RFID chip 1.Wherein, fixed block
401 are set to the position far from axle center.After being arranged in this way, when RFID chip 1 can be protected not fastened as far as possible by 1) fastener 6
The power applied；2) the uneven power generated when fastener 6 loosens；3) vibration that fastener 6 is subject at work, and then avoid
1 fragmentation of RFID chip improves the reliability for loosening detection device, and so that loosening detection device is dismantled repeatedly and repeat profit
With.
Optionally, fastener 6 can be threaded fastener 6, can also be the diversified forms such as snap-fittings 6.
The utility model additionally provides a kind of detection method of above-mentioned loosening detection device, includes the following steps：
RFID reader 7 emits to the first termination power 2, the second termination power 3 and RFID chip 1 and detects electromagnetic wave letter
Number；RFID reader 7 is effectively or to fail by reading RFID chip 1, and tightening state or loosening shape are in obtain fastener 6
The status information of state.
Wherein, the occupation mode of RFID reader 7 can be manually or automatically mode, can also be RFID reader 7
On mobile object, realize that automatic on-line detects whether fastener 6 loosens by means such as program controls.
Further, when it is effective to read RFID chip 1, judgement fastener 6 is in tightening state；When reading RFID cores
When piece 1 is failure, judgement fastener 6 is in loosening state.
Refering to what is shown in Fig. 3, it is the application method for loosening detection device, electronic tag is without containing RFID reader 7
Loosen the part of detection device.Specifically used method is as follows：
Step S1, by electronic tag lower component (i.e. the first component 4) and electronic tag upper element (i.e. second component 5)
It is assembled together and constitutes electronic tag, then the screw rod of threaded fastener 6 to be detected is passed through into the pilot hole on electronic tag；
Step S2 tightens the threaded fastener 6 for having assembled electronic tag；
Step S3 is emitted using the electronic tag that RFID reader 7 is installed on detected threaded fastener 6 and detection is electric
Magnetostatic wave signal；
Step S4 judges to read whether electronic tag signal succeeds, if being successfully entered step S5, otherwise enters step S6；
Step S5 judges that being detected threaded fastener 6 does not loosen；
Step S6：Judgement is detected threaded fastener 6 and loosens.
Compared with the existing technology, loosening detection device provided by the utility model has the following advantages that：(1) electronic tag without
Source is designed, and replacement, at low cost is easily installed；(2) waterproof antivibration and reusable, long lifespan；It (3) can be online, quick, accurate
Diagnosis really is detected to fastener loosening, detection efficiency is high.
In conclusion the principles of the present invention and its work(is only illustrated in above-described embodiment provided by the utility model
Effect, rather than limits the present invention.Any person skilled in the art all can without prejudice to the utility model spirit and
Under the scope of, it carries out modifications and changes to above-described embodiment.Therefore, those of ordinary skill in the art is not taking off such as
All equivalent modifications completed under spirit revealed from the utility model and technological thought or change, should be new by this practicality
The claim of type is covered.
Claims (12)
1. a kind of loosening detection device for fastener, which is characterized in that including：
The first component is equipped with the first termination power；
Second component is equipped with the second termination power with the complementation of the first termination power；
RFID chip；
When the fastener is in tightening state, first termination power is connected with second termination power, described
RFID chip is effective；When the fastener is in loosening state, first termination power and second termination power are not
Connection, the RFID chip failure.
2. loosening detection device according to claim 1, which is characterized in that on the first component and the second component
It is respectively equipped with an at least butt contact, when the fastener is in tightening state, the contact point on the first component and institute
The contact point stated on second component all contacts, and first termination power is connected with second termination power；When described
When fastener is in loosening state, the contact point on the first component does not connect all with the contact point on the second component
It touches, first termination power is not connected to second termination power.
3. loosening detection device according to claim 2, which is characterized in that when the quantity of an at least butt contact is
When 1, it is connected per internal contact point；When the quantity of an at least butt contact is 2 or more, per internal contact point phase
Connection, and each pair of contact point is not connected to.
4. loosening detection device according to claim 3, which is characterized in that the contact point on the first component is convex connects
Contact, the second component are equipped with and the contact point on the recessed contact point of the convex contact point cooperation or the first component
For recessed contact point, the second component is equipped with the convex contact point with the recessed contact point cooperation, when the fastener is in tight
When solid fraction state, all cooperation contacts the convex contact point with the recessed contact point；When the fastener is in loosening state, institute
Stating convex contact point, all cooperation does not contact with the recessed contact point.
5. loosening detection device according to claim 4, which is characterized in that the RFID chip and the first component or second
The one pair of which contact point of component is connected.
6. loosening detection device according to claim 1, which is characterized in that on the first component and the second component
Equipped with pilot hole, passes through and fasten for the fastener.
7. loosening detection device according to claim 6, which is characterized in that the first component includes the first elastomer,
The second component includes the second elastomer, and first elastomer and second elastomer are made of insulative water-proof material.
8. loosening detection device according to claim 7, which is characterized in that the outer rim of first elastomer is equipped with week
To protrusion, the outer rim of second elastomer is equipped with and the peripheral recess of the circumferential protrusion cooperation or first elasticity
The outer rim of body is equipped with peripheral recess, and the outer rim of second elastomer is convex equipped with the circumferential direction coordinated with the peripheral recess
Portion, the circumferential direction protrusion generate sealing function with peripheral recess interference fit.
9. loosening detection device according to claim 8, which is characterized in that first elastomer or second elasticity
Fixed block is additionally provided on body, for placing the RFID chip.
10. the loosening detection device according to any one of claim 2-5, which is characterized in that at least a pair of of contact
The quantity of point is 2.
11. the loosening detection device according to any one of claim 1-9, which is characterized in that the fastener is screw thread
Fastener.
12. the loosening detection device according to any one of claim 1-9, which is characterized in that further include RFID reader,
It is effectively or to fail by reading RFID chip, to obtain the state letter that the fastener is in tightening state or loosening state
Breath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820246110.XU CN207924163U (en) | 2018-02-11 | 2018-02-11 | A kind of loosening detection device for fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820246110.XU CN207924163U (en) | 2018-02-11 | 2018-02-11 | A kind of loosening detection device for fastener |
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| Publication Number | Publication Date |
|---|---|
| CN207924163U true CN207924163U (en) | 2018-09-28 |
Family
ID=63599985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820246110.XU Active CN207924163U (en) | 2018-02-11 | 2018-02-11 | A kind of loosening detection device for fastener |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181659A (en) * | 2018-02-11 | 2018-06-19 | 上海振华重工(集团)股份有限公司 | A kind of loosening detection device and its detection method for fastener |
| CN111323843A (en) * | 2020-03-17 | 2020-06-23 | 中煤科工集团重庆研究院有限公司 | Device for detecting fastening state of mining explosion-proof shell fastener |
| CN111508776A (en) * | 2020-03-13 | 2020-08-07 | 浙江城电电气有限公司 | AC contactor |
-
2018
- 2018-02-11 CN CN201820246110.XU patent/CN207924163U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181659A (en) * | 2018-02-11 | 2018-06-19 | 上海振华重工(集团)股份有限公司 | A kind of loosening detection device and its detection method for fastener |
| CN108181659B (en) * | 2018-02-11 | 2024-03-15 | 上海振华重工(集团)股份有限公司 | Loosening detection device for fastener and detection method thereof |
| CN111508776A (en) * | 2020-03-13 | 2020-08-07 | 浙江城电电气有限公司 | AC contactor |
| CN111508776B (en) * | 2020-03-13 | 2022-06-24 | 安德利集团有限公司 | AC contactor |
| CN111323843A (en) * | 2020-03-17 | 2020-06-23 | 中煤科工集团重庆研究院有限公司 | Device for detecting fastening state of mining explosion-proof shell fastener |
| CN111323843B (en) * | 2020-03-17 | 2022-07-19 | 中煤科工集团重庆研究院有限公司 | Device for detecting fastening state of mining explosion-proof shell fastener |
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