CN202126332U - Calibration device for torque wrench - Google Patents
Calibration device for torque wrench Download PDFInfo
- Publication number
- CN202126332U CN202126332U CN2011201980121U CN201120198012U CN202126332U CN 202126332 U CN202126332 U CN 202126332U CN 2011201980121 U CN2011201980121 U CN 2011201980121U CN 201120198012 U CN201120198012 U CN 201120198012U CN 202126332 U CN202126332 U CN 202126332U
- Authority
- CN
- China
- Prior art keywords
- torsion
- linear amplifier
- torque
- sensor
- torque sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a calibration device for a torque wrench, which comprises a metal shell, a sensor bottom plate, a torque sensor, a linear amplifier, a display and a power supply, wherein the sensor bottom plate, the linear amplifier and the power supply are arranged inside the metal shell; the display is embedded onto a panel of the metal shell; the torque sensor is fixedly connected with a torque head by a key; the torque head is arranged on the sensor bottom plate through a bearing; the power supply is in electrical connection with the linear amplifier so as to provide power for the linear amplifier; the linear amplifier is in electrical connection with the torque sensor so as to provide power for the torque sensor and receive torque signals from the torque sensor; and the display is in electrical connection with the linear amplifier so as to display the measured torque valves. The calibration device provided by the utility model is compact in structure and high in measuring precision, has stable electrical signals and avoids the interference from electromagnetic waves.
Description
Technical field
The utility model relates to a kind of torsional test equipment, particularly relates to a kind of torque spanner calibration equipment.
Background technology
The torque force measuring tool of selling in the market has two types.A kind of is to be directly installed on survey sensor on the dynamic torque tool, at certain position of dynamic torque tool display, reading on dynamic torque tool is installed; Another kind is to be made in a housing the inside to survey sensor separately, and amplifier and make displays through cable, are delivered to amplifier and display to measuring-signal in another box the inside.Before a kind of shortcoming of measuring instrument be only to measure the torsional moment of torque spanner itself, and other dynamic torque tool of energy measurement not.The display of a kind of measuring instrument in back separates with survey sensor, and sensor is placed on separately in the housing, because sensor housing is smaller and more exquisite, when measuring greatly torsion, need take some measures, otherwise rock easily or roll.
The utility model content
The purpose of the utility model is exactly in order to provide a kind of torque spanner calibration equipment, to overcome the above-mentioned defective that exists in the prior art.
In order to achieve the above object, the utility model has adopted following technical scheme: a kind of torque spanner calibration equipment comprises metal shell, sensor base plate, torsion torque sensor, linear amplifier, display and power supply; Said sensor base plate, linear amplifier and power supply are installed in the metal shell respectively; Display is embedded on the panel of metal shell, and said torsion torque sensor is installed on the sensor base plate through torsion head, bearing with one heart, and power supply and linear amplifier are electrically connected; To linear amplifier power supply is provided; Linear amplifier and torsion torque sensor are electrically connected, and to torsion torque sensor power supply are provided, and receive the torsion signal from torsion torque sensor; Display and linear amplifier are electrically connected, and show the torque value that records.
Described torsion torque sensor comprises torsion head, metal rectangular beam and the torsion tail that order fuses and laterally installs; The torsion head relies on Bearing Installation on sensor base plate; Torsion head center is provided with the torsion input hole, and the torsion head is fixedly connected with key with torsion torque sensor, and the torsion tail is provided with the U-shaped mouth; The U-shaped muzzle is on a pin, and this pin is fixed on the sensor base plate; Have two strain bores that connect each other in the centre of metal rectangular beam; Form four strain regions in rectangular beam both sides; Post resistance strain gage on each strain zone; Four resistance strain gages are electrically connected into an electric bridge, and this electric bridge and linear amplifier are electrically connected, and receive and from the supply voltage of linear amplifier and to linear amplifier torsion signal are provided.
Described metal shell is made by iron plate.
The torque spanner tester compact conformation of the utility model has been avoided electromagnetic interference, and electric signal is stable, and measuring accuracy is high.
Description of drawings
Fig. 1 is the outside drawing of a kind of torque spanner calibration equipment of the utility model;
Fig. 2 is the basic structure synoptic diagram of a kind of torque spanner calibration equipment of the utility model;
Fig. 3 is the electrical block diagram of a kind of torque spanner calibration equipment of the utility model;
Fig. 4 is the structural representation of the torsion torque sensor of a kind of torque spanner calibration equipment of the utility model;
Fig. 5 is the self-correcting synoptic diagram of a kind of torque spanner calibration equipment of the utility model;
Fig. 6 is the electrical bridge principle synoptic diagram in the utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Accompanying drawing is depicted as a preferred embodiment of the utility model, and the technical scheme of the utility model is not limited to present embodiment.
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of torque spanner calibration equipment of the utility model comprises metal shell 1, sensor base plate 2, torsion torque sensor 3, linear amplifier 4, display 5 and power supply 6.Sensor base plate 2, linear amplifier 4 and power supply 6 are installed in respectively in the metal shell 1; Display 5 is embedded on the panel of metal shell 1; Torsion torque sensor 3 usefulness keys are fixedly connected with torsion head 31, and torsion head 31 relies on Bearing Installation on sensor base plate 2, and power supply 6 is electrically connected to linear amplifier with linear amplifier 4 power supply is provided; Linear amplifier 4 is electrically connected with torsion torque sensor 3; Linear amplifier 4 provides power supply and receives the torsion signal from torsion torque sensor 3 to torsion torque sensor 3, and display 5 is electrically connected with linear amplifier 4, and the numeral of demonstration is the torque value for recording both.
Cooperation is referring to Fig. 4; Torsion torque sensor 3 in the utility model comprises that order fuses and torsion head 31, metal rectangular beam 32 and the torsion tail 33 of horizontally set; Torsion head 31 is provided with torsion input hole 34; Torsion tail 33 is provided with U-shaped mouth 35, and U-shaped mouth 35 is fastened on the pin 7, and this pin 7 is fixed on the sensor base plate 2.Centre at metal rectangular beam 32; Have two strain bores 37 that connect each other; Form four strain regions in metal rectangular beam 32 both sides, each strain regions surface is posted 361,362,363,364, four resistance strain gages of resistance strain gage and is electrically connected into an electric bridge (referring to Fig. 6).On metal shell 1, be provided with torsional test hole 11 (referring to Fig. 1) at correspondence position corresponding to the torsion input hole 34 of torsion torque sensor 3.When reaching behind torsion input hole 34 input torques to electric bridge input power supply, the beams of metal of torque sensor receives a moment of flexure, so deform in the both sides of beams of metal, wherein a side is stretched, and opposite side then is by compression.Resistance strain gage 361,362,363,364 firmly is attached on the beams of metal corresponding strain zone, distortion simultaneously with it: receive the resistance strain gage (for example 361,362) of tensile side, it is big that its resistance becomes; And the resistance strain gage of side (for example 363,364) by compression; Its resistance diminishes, so between the both sides foil gauge (resistance value) in electric bridge, form electric potential difference; This electric potential difference is imported linear amplifier 4 as torque signal.
When the torque spanner calibration equipment is carried out self-correcting, with reference to Fig. 5.Insert a square tenon 8 that matches, horizontal metal lever 9 of square feather joint at torsion input hole 34 earlier.This bimetallic lever 9 should can not be out of shape in the torsional test scope, and the weight distribution of lever should be evenly and strict symmetry.After the energized, display 5 should be shown as zero.If non-vanishing, can regulate " zero trimmer ".Then, hang up the counterweight 10 of a known weight at an end of lever.The weight size of this counterweight should be within the scope of torque spanner calibration equipment.At this moment, the numerical value that display 5 shows, should for:
Moment of torsion (ox rice)=counterweight weight (kilogram) * counterweight is to the distance (rice) * 9.8 at torsion input hole center
If displayed value and aforementioned calculation value do not wait, " the full scale regulator potentiometer " in the linear adjustment amplifier 4 then.
Take off counterweight, counterweight is hung over the other end of lever, do and above-mentioned same work, the displayed value that the counterweight 10 of same weight is hung at one end should equate when hanging over the other end.If not etc., explain that then the strain regions wall thickness of beams of metal both sides does not wait, with the corresponding strain regions of reconditioning instrument polishing torsion torque sensor, make it equal.
The utility model is arranged in torsion torque sensor, linear amplifier on the base plate with metal shell 1 made of iron, and display 5 is embedded on the panel with metal shell 1 made of iron, forms a flat, rectangular shield with metal shell 1 made of iron.Because the electric signal of torsion torque sensor 3 outputs is very faint, need to use, so the electric signal connecting line between torsion torque sensor 3 and the linear amplifier 4 must reduce and disturb (signal) as far as possible through after amplifying about 1,000 times.Because torsion torque sensor, linear amplifier, display three close, it is very short to connect lead, after getting up with metal shell cover made of iron, has just isolated external electromagnetic wave interference, and the electric signal of calibration equipment is just highly stable.
The torque spanner calibration equipment has the branch of forward twisting and reverse twisting, and therefore, linear amplifier 4 existing positive voltages outputs also have negative voltage output, and when not having the torsion input, the output of linear amplifier 4 should be zero.For this reason, linear amplifier 4 is provided with balance adjustment circuit (also being called " zero-bit regulating circuit "), is used for resonance-amplifier when not having the torsion input, keeps being output as zero.Linear amplifier 4 also is provided with enlargement factor regulating circuit (also being called " full scale regulating circuit ").When the torque spanner calibration equipment is carried out self-correcting,, can utilize the enlargement factor regulating circuit if displayed value and input torque calculated value do not match, adjust to match till.Amplifier also is provided with the bridge voltage regulating circuit, regulates bridge voltage, can regulate the size of torque sensor output signal, the resolution that is beneficial to regulate the torque spanner tester.For linear amplifier, input signal is big, and resolution is just high.
Claims (3)
1. torque spanner calibration equipment; It is characterized in that: comprise metal shell, sensor base plate, torsion torque sensor, linear amplifier, display and power supply; Said sensor base plate, linear amplifier and power supply are installed in respectively in the metal shell, and display is embedded on the panel of metal shell, and torsion torque sensor is installed on the sensor base plate through torsion head, bearing with one heart; Power supply and linear amplifier are electrically connected; To linear amplifier power supply is provided, linear amplifier and torsion torque sensor are electrically connected, and power supply is provided and receives the torsion signal from torsion torque sensor to torsion torque sensor; Display and linear amplifier are electrically connected, and show the torque value that records.
2. a kind of torque spanner calibration equipment according to claim 1; It is characterized in that: described torsion torque sensor comprises torsion head, metal rectangular beam and the torsion tail that order fuses and laterally installs, and the torsion head relies on Bearing Installation on sensor base plate, and torsion head center is provided with the torsion input hole; The torsion head is fixedly connected with key with torsion torque sensor; The torsion tail is provided with the U-shaped mouth, and the U-shaped muzzle is on a pin, and this pin is fixed on the sensor base plate; Have two strain bores that connect each other in the centre of metal rectangular beam; Form four strain regions in rectangular beam both sides; Post resistance strain gage on each strain zone; Four resistance strain gages are electrically connected into an electric bridge, and this electric bridge and linear amplifier are electrically connected, and receive and from the supply voltage of linear amplifier and to linear amplifier torsion signal are provided.
3. a kind of torque spanner calibration equipment according to claim 1, it is characterized in that: described metal shell is made by iron plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201980121U CN202126332U (en) | 2011-06-13 | 2011-06-13 | Calibration device for torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201980121U CN202126332U (en) | 2011-06-13 | 2011-06-13 | Calibration device for torque wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202126332U true CN202126332U (en) | 2012-01-25 |
Family
ID=45489397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201980121U Expired - Lifetime CN202126332U (en) | 2011-06-13 | 2011-06-13 | Calibration device for torque wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202126332U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983400A (en) * | 2014-05-14 | 2014-08-13 | 西安热工研究院有限公司 | All-powerful detecting device and method for stress-strain instrument |
-
2011
- 2011-06-13 CN CN2011201980121U patent/CN202126332U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983400A (en) * | 2014-05-14 | 2014-08-13 | 西安热工研究院有限公司 | All-powerful detecting device and method for stress-strain instrument |
| CN103983400B (en) * | 2014-05-14 | 2016-03-02 | 西安热工研究院有限公司 | A kind of ess-strain instrument Universal detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI EORIVE CO., LTD. Free format text: FORMER NAME: SHANGHAI EDRIVE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 200240 Shanghai city Minhang District Jianchuan road 953 Lane 322 Patentee after: SHANGHAI EDRIVE CO., LTD. Patentee after: Shanghai Automobile Eorive Co.,Ltd. Patentee after: Shanghai Automobile Eorive Engineering Technology Research Center Co.,Ltd. Address before: 200240 Shanghai city Minhang District Jianchuan road 953 Lane 154, block D Patentee before: Shanghai Electric Drive Co., Ltd. Patentee before: Shanghai Automobile Eorive Co.,Ltd. Patentee before: Shanghai Automobile Eorive Engineering Technology Research Center Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |