CN207066951U - Measure the spanner of total coefficient of friction of bolt - Google Patents
Measure the spanner of total coefficient of friction of bolt Download PDFInfo
- Publication number
- CN207066951U CN207066951U CN201720588119.4U CN201720588119U CN207066951U CN 207066951 U CN207066951 U CN 207066951U CN 201720588119 U CN201720588119 U CN 201720588119U CN 207066951 U CN207066951 U CN 207066951U
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- Prior art keywords
- bolt
- spanner
- mrow
- total
- module
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- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 description 3
- 238000009432 framing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The utility model discloses a kind of spanner for the total coefficient of friction for measuring bolt, the spanner includes input module, measurement module, computing module and display module, the input module is used for the natural parameter for inputting bolt, and the measurement module is used for the screw-down torque M for measuring boltAWith unscrew torque ML, the computing module is for the natural parameter according to the bolt and the screw-down torque MAAnd described unscrew torque MLCalculate total friction coefficient μ of bolttotal, total friction coefficient μ of the display module for showing the bolttotal.By setting input module and measurement module, the data needed for computing module can be obtained, display module can show the result that computing module calculates, so as to which staff can intuitively know total coefficient of friction of bolt.The metering system of so spanner is simple and accurate, and obtained total coefficient of friction is actual total coefficient of friction.
Description
Technical field
It the utility model is related to mechanical detection technical field, more particularly to a kind of total coefficient of friction for measuring bolt is pulled
Hand.
Background technology
In correlation technique, bolt coefficient of friction is a parameter for ensureing that clamping force is critically important, and it, which crosses conference, causes to clamp
Power is too small, too small that bolt can be caused to be twisted into two parts.To carry out theoretical calculation, and control clamping force size to clamping force, it is necessary to rubbing
Wipe coefficient to be controlled, need to so use a kind of method to measure the coefficient of friction of bolt.
Bolt impact wrench can only measure torque, angle at this stage, can not measure rubbing of coordinating between bolt and connected piece
Wipe coefficient.And total coefficient of friction is measured at this stage and typically uses horizontal friction testing machine and tightening machine.
But measuring total coefficient of friction using horizontal friction testing machine has following defect：The horizontal friction testing machine can only
The coefficient of friction of master body, standard surface state under fixed clamping rigidity is measured, the friction in coordinating with actual bolt
Coefficient is distinguishing, and actual calculate is that requirement obtains real coefficient of friction；Further, horizontal friction testing machine is using fixation
Clamping force testboard, it is immeasurable for bolt of some clamping lengths less than 1d.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality
With a kind of spanner for the total coefficient of friction for measuring bolt of new proposition, the spanner can obtain the total coefficient of friction of actual bolt,
And the infinite in length of bolt is determined.
According to the spanner of total coefficient of friction of measurement bolt of the present utility model, the spanner includes input module, measurement
Module, computing module and display module, the input module are used for the natural parameter for inputting bolt, and the measurement module is used to survey
Measure the screw-down torque M of boltAWith unscrew torque ML, the computing module is for the natural parameter according to the bolt and institute
State screw-down torque MAAnd described unscrew torque MLCalculate total friction coefficient μ of bolttotal, the display module is used to showing described
Total friction coefficient μ of bolttotal。
According to the spanner of total coefficient of friction of measurement bolt of the present utility model, by setting input module and measurement mould
Block, the data needed for computing module can be obtained, computing module can be shown the result of calculating by display module, so as to work
Total coefficient of friction of bolt can intuitively be known by making personnel.The metering system of so spanner is simple and accurate, and is reality
Total coefficient of friction, in addition, the bolt of infinite in length system of the spanner for bolt, i.e. random length, spanner can be had
The measurement of effect ground.
In some examples of the present utility model, the natural parameter of the bolt includes bolt pitch P, pitch diameter of thread d, end
Face contact diameter Dkm。
In some examples of the present utility model, the measurement module includes：Torque sensor and angular transducer.
In some examples of the present utility model, the torque sensor is used to according to tightening direction turn on connected piece
The screw-down torque M is measured during dynamic boltA。
In some examples of the present utility model, the torque sensor and the angular transducer are used in connected piece
On according to rotational direction rotating bolt when measure and described unscrew torque ML。
In some examples of the present utility model, the computing module is according to formula：
Calculate total friction coefficient μ of bolttotal。
In some examples of the present utility model, the display module includes display screen.
In some examples of the present utility model, the display screen is touch display screen.
In some examples of the present utility model, the input module is touch display screen.
Brief description of the drawings
Fig. 1 is the structural framing figure according to the spanner of the utility model embodiment；
Fig. 2 is the structural framing figure according to the spanner of the utility model embodiment.
Reference：
Spanner 10；
Torque sensor 1；Angular transducer 2；Input module 3；Data acquisition chip 4；Processor 5；Display screen 6；Measurement
Module 7；Computing module 8；Display module 9.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that new to this practicality
The limitation of type.
The spanner for total coefficient of friction that bolt is measured according to the utility model embodiment is described in detail below with reference to Fig. 1-Fig. 2
10。
As shown in Fig. 2 spanner 10 includes input module 3, measurement module 7, computing module 8 and display module 9, input module
3 natural parameter for inputting bolt, the natural parameter of bolt are the parameter that can be directly obtained according to bolt to be measured.Its
In, the natural parameter of bolt can include bolt pitch P, pitch diameter of thread d2, end contact diameter Dkm.Alternatively, input module 3
Can be touch display screen, such staff can input the natural parameter of bolt by way of touch, so as to so that
It must input simple and conveniently.
Measurement module 7 is used for the screw-down torque M for measuring boltAWith unscrew torque ML, wherein, according to stubborn on connected piece
Tight direction rotating bolt, spanner 10 measure screw-down torque MA；Surveyed on connected piece according to rotational direction rotating bolt, spanner 10
Torque M must be unscrewedL.As shown in figure 1, measurement module 7 can include：Torque sensor 1 and angular transducer 2, spanner 10 can be with
Screw-down torque M is measured according to torque sensor 1 and angular transducer 2 respectivelyAWith unscrew torque ML.Thus, measurement module 7 can
Bolt is measured with actual, so that total coefficient of friction of bolt is actual total coefficient of friction.
Computing module 8 is used for natural parameter and screw-down torque M according to boltAAnd unscrew torque MLCalculate always rubbing for bolt
Wipe coefficient μtotal, computing module 8 can be processor 5, wherein, as shown in figure 1, being connected between processor 5 and input module 3
Data acquisition chip 4, wherein, the data obtained measured by torque sensor 1 and angular transducer 2 are also by data acquisition core
Piece 4 is transferred to processor.
Display module 9 is used for the total friction coefficient μ for showing bolttotal.As shown in figure 1, display module 9 includes display screen 6,
Display screen 6 is used for the total friction coefficient μ for showing bolttotal.Preferably, display screen 6 can be touch display screen.Thus, work
Personnel can be made a choice and be adjusted in a manner of touch in the touch display screen, so as to be advantageous to obtain total friction system
Number.
Computing module 8 is according to formula：
Calculate total friction coefficient μ of bolttotal。
The cause of above-mentioned formula is provided below.When tightening bolt, screw-down torque M that spanner 10 measuresAFormula is：
MA=Fv×[0.159P+μtotal×(0.577d2+0.5Dkm)]；
When loosering a bolt, what spanner 10 measured unscrews torque MLFormula is：
ML=Fv×[|0.159P+μtotal×(0.577d2+0.5Dkm)|]；
μ can be obtained by the combination of above-mentioned two formulatotalCalculation formula：
Thus, by setting input module 3 and measurement module 7, the data needed for computing module 8 can be obtained, calculate mould
Block 8 can be shown the result of calculating by display module 9, so as to which staff can intuitively know total friction system of bolt
Number.The metering system of so spanner 10 is simple and accurate, and is actual total coefficient of friction, in addition, spanner 10 is for bolt
Infinite in length system, i.e. random length bolt, spanner 10 can carry out effectively measuring.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (9)
1. a kind of spanner (10) for the total coefficient of friction for measuring bolt, it is characterised in that the spanner (10) includes input module
(3), measurement module (7), computing module (8) and display module (9),
The input module (3) is used for the natural parameter for inputting bolt, and the measurement module (7) is used for the screwing force for measuring bolt
Square MAWith unscrew torque ML, the computing module (8) is for the natural parameter according to the bolt and the screw-down torque MA
And described unscrew torque MLCalculate total friction coefficient μ of bolttotal, the display module (9) is for showing the total of the bolt
Friction coefficient μtotal。
2. spanner (10) according to claim 1, it is characterised in that the natural parameter of the bolt include bolt pitch P,
Pitch diameter of thread d2, end contact diameter Dkm。
3. spanner (10) according to claim 2, it is characterised in that the measurement module (7) includes：Torque sensor
And angular transducer (2) (1).
4. spanner (10) according to claim 3, it is characterised in that the torque sensor (1) is used in connected piece
On according to tightening direction rotating bolt when measure the screw-down torque MA。
5. spanner (10) according to claim 3, it is characterised in that the torque sensor (1) and the angle sensor
Device (2), which is used to measuring when on connected piece according to rotational direction rotating bolt, described unscrews torque ML。
6. the spanner (10) according to claim any one of 1-5, it is characterised in that the computing module (8) is according to formula：
<mrow>
<msub>
<mi>&mu;</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>t</mi>
<mi>a</mi>
<mi>l</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mn>0.159</mn>
<mi>P</mi>
<mrow>
<mo>(</mo>
<mo>-</mo>
<mn>1</mn>
<mo>+</mo>
<mfrac>
<msub>
<mi>M</mi>
<mi>A</mi>
</msub>
<mrow>
<mo>|</mo>
<msub>
<mi>M</mi>
<mi>L</mi>
</msub>
<mo>|</mo>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mo>(</mo>
<mn>0.577</mn>
<msub>
<mi>d</mi>
<mn>2</mn>
</msub>
<mo>+</mo>
<mn>0.5</mn>
<msub>
<mi>D</mi>
<mrow>
<mi>k</mi>
<mi>m</mi>
</mrow>
</msub>
<mo>)</mo>
<mo>&times;</mo>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mfrac>
<msub>
<mi>M</mi>
<mi>A</mi>
</msub>
<mrow>
<mo>|</mo>
<msub>
<mi>M</mi>
<mi>L</mi>
</msub>
<mo>|</mo>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
</mfrac>
</mrow>
Calculate total friction coefficient μ of bolttotal。
7. spanner (10) according to claim 6, it is characterised in that the display module (9) includes display screen.
8. spanner (10) according to claim 7, it is characterised in that the display screen is touch display screen.
9. spanner (10) according to claim 1, it is characterised in that the input module (3) is touch display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720588119.4U CN207066951U (en) | 2017-05-24 | 2017-05-24 | Measure the spanner of total coefficient of friction of bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720588119.4U CN207066951U (en) | 2017-05-24 | 2017-05-24 | Measure the spanner of total coefficient of friction of bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207066951U true CN207066951U (en) | 2018-03-02 |
Family
ID=61504829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720588119.4U Expired - Fee Related CN207066951U (en) | 2017-05-24 | 2017-05-24 | Measure the spanner of total coefficient of friction of bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207066951U (en) |
-
2017
- 2017-05-24 CN CN201720588119.4U patent/CN207066951U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Wrench for measuring the total friction coefficient of bolts Effective date of registration: 20200817 Granted publication date: 20180302 Pledgee: BEIQI FOTON MOTOR Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2020990000977 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210507 Granted publication date: 20180302 Pledgee: BEIQI FOTON MOTOR Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2020990000977 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Wrench for measuring total friction coefficient of bolt Effective date of registration: 20210726 Granted publication date: 20180302 Pledgee: BEIQI FOTON MOTOR Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2021990000644 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231123 Granted publication date: 20180302 Pledgee: BEIQI FOTON MOTOR Co.,Ltd. Pledgor: Beijing baowo Automobile Co.,Ltd.|Borgward Automotive (China) Co., Ltd. Registration number: Y2021990000644 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |