CN2510241Y - Digital-display torque wrench - Google Patents
Digital-display torque wrench Download PDFInfo
- Publication number
- CN2510241Y CN2510241Y CN 01265982 CN01265982U CN2510241Y CN 2510241 Y CN2510241 Y CN 2510241Y CN 01265982 CN01265982 CN 01265982 CN 01265982 U CN01265982 U CN 01265982U CN 2510241 Y CN2510241 Y CN 2510241Y
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Abstract
The utility model relates to a digital display torque wrench which can apply quantitative fastening torque to the screw fastener. The wrench comprises a wrench head (1), a measuring rod (2), an electric box (4) and a handle (6). The electric box (4) is provided with an electronic circuit component which comprises a signal amplifier (8), an analog-to-digital converter (9), a microcontroller (10) for digital processing and calculating, a display circuit (11), a preset alarm circuit (12), a setting circuit (13), an undervoltage alarm circuit (14), a unit conversion circuit (15), a model conversion circuit (16), an auto-null circuit (17) and a power conversion and steady voltage circuit (18). The utility model adopts dual integration A/D converter for the analog-to-digital converter (9) to make the circuit simple and the cost low.
Description
The utility model relates to a kind of Digital Electronic Torque Wrench that can quantitatively apply Tightening moment to threaded fastener.
Digital Electronic Torque Wrench is a kind ofly can quantitatively apply Tightening moment to threaded fastener, and shows with the pattern of numeral and the size of Tightening moment to be widely used in industry and department that the double thread Tightening moment has strict demand.97208330), the special-purpose both arms torque wrench of railway (application number: 00226490.0) etc. the applicant once applied for a plurality of patents with regard to this theme to State Patent Office, as torque wrench (application number:.
Digital Electronic Torque Wrench is at present just towards aspect development such as intelligent, that the degree of accuracy is high, easy to use.Existing Digital Electronic Torque Wrench weak point mainly is circuit complexity, cost height, makes troubles to the user.
The purpose of this utility model is: provide that a kind of circuit structure is simple, cost is low, and have intellectuality, easy to use, the Digital Electronic Torque Wrench that can accurately show the torque value size.
The purpose of this utility model is achieved in that it comprises driving end 1, wherein driving end 1 is by being connected with measuring stick 2 with the ratchet mechanism that commutates with can circling round of its one, electrical box 4 is enclosed within on the measuring stick 2, the afterbody of electrical box 4 is equipped with handle 6, electronic circuit assembly 5 is housed in the electrical box 4, and electronic circuit assembly 5 is made up of pcb component and panel.Pcb component comprises: signal amplifier 8, analog-digital converter 9, the microcontroller 10 that carries out digital processing and calculating, display circuit 11, preset warning circuit 12, initialization circuit 13, undervoltage warning circuit 14, unit change-over circuit 15, mode switching circuit 16, automatically clear " zero " circuit 17, power conversion and mu balanced circuit 18.Its contribution to prior art is:
Be milled with two symmetrical planes in the both sides of described measuring stick 2, respectively post two sheet resistance strain gauges 3 on this plane.Strain ga(u)ge 3 connects with bridge circuit 7, the input of its output termination signal amplifier 8, the output of signal amplifier 8 is connected with the input of the operational amplifier IC1-2 of analog-digital converter 9, described analog-digital converter 9 is by P3.1 (I/O) mouthful, P3.2 (I/O) mouth of IC1-2, IC2-1 operational amplifier, triode V1, single-chip microcomputer IC4, and resistance R 4, R5, R6, R7, R8, R9, capacitor C4, C5, C6 form; Its electrical connection is: be used to send P3.1 (I/O) mouthful of series resistor R9 of detection signal by single-chip microcomputer IC4 after, connect the base stage of V1 triode, input with operational amplifier IC1-2 behind the collector series resistance R4 of V1 triode is connected, integrating condenser C5 is connected between the input and output of IC1-2 of operational amplifier, the output of IC1-2 is connected with the input of second level operational amplifier IC2-1, and the output of IC2-1 connects P3.2 (I/O) mouthful of single-chip microcomputer IC4.
After detection signal after analog-digital converter 9 amplifies signal amplifier 8 becomes data signal, after delivering to microcontroller 10 earlier and carrying out digital processing and calculate, send display circuit 11 to show again.Wherein microcontroller 10, display circuit 11, the electric connection structure that presets warning circuit 12, initialization circuit 13, undervoltage warning circuit 14, unit change-over circuit 15, mode switching circuit 16, automatically clear " zero " circuit 17, power conversion and mu balanced circuit 18 are widely used as prior art in the Digital Electronic Torque Wrench that has sold in market, do not repeat them here.
The utility model is owing to adopted the double integral A/D converter of above-mentioned design on analog-digital converter 9, its circuit is simple, cost is low, and has intellectuality, degree of accuracy height, easy to use simultaneously, can accurately show the torque value size; Have any alarming value setting, sound and light alarm, startup self-detection, time-delay shutdown automatically, automatic clear, unit and change automatically that (N.m, Ibf.ft, Ibf.in), indicating value are followed the tracks of, peak-value-holding function.
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an electrical principle schematic diagram of the present utility model.
The utility model has adopted the principle of equal effects of moment of flexure to moment of torsion.Demonstrate the size of screw thread torque value by the size of measuring dynamometer link 2 moment of flexure values.Its structural relation is that the both sides of measuring stick 2 are milled with two symmetrical planes, respectively posts two sheet resistance strain gauges 3 on the plane, and strain ga(u)ge 3 connects with bridge circuit 7.When binding thread, measuring stick 2 flexural deformation under moment loading.Be attached to the strain ga(u)ge 3 of measuring stick 2 both sides, one side tension, another side pressurized.The bridge detection circuit 7 that four sheet resistance strain gauges 3 are formed can spread out of deformation signal.Because: the moment that the bending deformation quantity of measuring stick 2 and spanner are subjected to has definite linear relationship.The taper connection of electrical box 4 by its front end, be enclosed within on the measuring stick 2.Handle 6 is contained in the afterbody of electrical box 4, in the handle 6 supplying cell is housed.Electronic circuit assembly 5 is housed in the electrical box 4.Electronic circuit assembly 5 is made up of printed wiring board component, panel.The printed wiring board component includes signal amplifier 8, analog-digital converter 9, microcontroller (MCU) 10, display circuit 11, presets warning circuit 12, sets (presetting) circuit 13, undervoltage warning circuit 14, unit change-over circuit 15, pattern (measurements) change-over circuit 16, " zero " circuit 17, power conversion and mu balanced circuit 18 clearly automatically.
Signal amplifier 8 is made up of ICI-1 operational amplifier, W2 potentiometer, R2, R3 resistance, C1, C2, C3 capacitor.It is amplified to analog-digital converter 9 needed magnitudes of voltage to the faint deformation signal of bridge detection circuit 7.
Analog-digital converter 9 is by P3.1 (I/O) mouthful of IC1-2, IC2-1 operational amplifier, V1 triode, IC4 single-chip microcomputer, and P3.2 (I/O) mouthful, R4, R5, R6, R7, R8, R9 resistance, C4, C5, C6 capacitor are formed.Its course of work is, when connecting power supply, the IC1-2 operational amplifier is output as high level, and the IC2-1 operational amplifier is output as that high level, P3.2 (I/O) mouth are input as high level, P3.1 (I/O) mouth is output as high level.At this moment, the P3.1 of single-chip microcomputer (I/O) mouth sends the detection low signal, start single-chip microcomputer inside counting device simultaneously and begin counting, detect low signal and be added in the ground level of V1 triode by R9, the conducting of V1 triode ,+5V voltage is added in the R4 resistance terminal and makes the discharge of C5 integrating capacitor, the output of IC1-2 operational amplifier is low level by hypermutation, the output of IC2-1 operational amplifier is low level by hypermutation, and when detecting low level for the P3.2 of single-chip microcomputer (I/O) mouthful, single-chip microcomputer inside counting device finishes counting.P3.1 (I/O) mouthful of output is uprised, finish once conversion, later on circulation repeatedly.Size and moment detection signal according to moment of torsion have definite linear relationship, demonstrate the size of torque value.Thereby simply reduced the spanner cost owing to adopt above-mentioned double integral A/D converter thereby Circuits System is become.Moment detection signal after analog-digital converter 9 amplifies signal amplifier 8 becomes digital quantity, after delivering to microcontroller (MCU) 10 earlier and carrying out digital processing and calculate, send display circuit 11 to show again.
Microcontroller (MCU) 10 is made up of IC4 single-chip microcomputer, R17, R18, R19, R20, R21 resistance, C10, C11, C12, C13 capacitor, C14 crystal oscillator, S1, S2, S3, S4, S5 thin film switch.Work through the whole electrical system of IC4 Single-chip Controlling after the programming.
Preset warning circuit 12 by the P1.5 (I/O) of V5 triode, LED light emitting diode, B buzzer, single-chip microcomputer mouthful, P1.6 (I/O) mouthful, P1.7 (I/O) mouthful, the BZ of LCD MODULE DY, BZ output, resistance R 22, R23 form.When torque value equals the preset torque value, send sound and light alarm.
Setting (presetting) circuit 13 is made up of P1.2 (I/O) mouth, P1.5 (I/O) mouth, P1.6 (I/O) mouth, P1.7 (I/O) mouth, P3.7 (I/O) mouth, the LCD MODULE DY of setting key (S1), options button (S2), single-chip microcomputer.Presetting under mode of operation and the presetting bit prompting, push options button (S2), select presetting bit earlier, push setting key (S1) again, make the torque value of show value of LCD MODULE DY for detecting, promptly set the torque value that (presetting) will be detected well.
Unit change-over circuit 15 is made up of P1.3 (I/O) mouth, P1.5 (I/O) mouth, P1.6 (I/O) mouth, P1.7 (I/O) mouth of unit key (S3), LCD MODULE DY, single-chip microcomputer.According to measuring requirement, push unit key (S3), measurement unit can change (N.m, Ibf.ft, Ibf.in) automatically.
Pattern (measurement) change-over circuit 16 is made up of P1.4 (I/O) mouth, P1.5 (I/O) mouth, P1.6 (I/O) mouth, P1.7 (I/O) mouth of mode key (S4), LCD MODULE DY, single-chip microcomputer.Push mode key (S4), can select peak value maintenance, indicating value to follow the tracks of, measure and preset three kinds of mode of operations.
Automatically clear " zero " circuit 17 by reset/reset mouthful (RES) of key point (S5), LCD MODULE DY, single-chip microcomputer, P1.5 (I/O) mouthful, P1.6 (I/O) mouthful, P1.7 (I/O) mouth form.
Power conversion and mu balanced circuit 18 are by IC3 DC/DC converter, V3 triode, V4 triode, V6 diode, V7 diode, L inductance, R10, R11, R12 resistance, C7, C8, C9 capacitor, the P3.5 of single-chip microcomputer (I/O) mouthful forms, it supply voltage by+3V～+ 6V becomes stable+5V power supply road and works.
Claims (1)
1, Digital Electronic Torque Wrench, it comprises driving end (1), wherein driving end (1) is by being connected with measuring stick (2) with the ratchet mechanism that commutates with can circling round of its one, electrical box (4) is enclosed within on the measuring stick (2), the afterbody of electrical box (4) is equipped with handle (6), electronic circuit assembly (5) is housed in the electrical box (4), and electronic circuit assembly (5) is made up of pcb component and panel, and pcb component comprises:
Be used for the measurement by magnification signal signal amplifier (8),
Be used for carrying out through the measuring-signal after amplifying the A/D conversion analog-digital converter (9),
Be used to carry out digital processing and calculating microcontroller (10) and display circuit (11), preset warning circuit (12),
Be used to preset the initialization circuit (13) of the torque value that will detect and undervoltage warning circuit (14), unit change-over circuit (15),
Be used for selecting mode switching circuit (16) and automatically clear " zero " circuit (17), power conversion and the mu balanced circuit (18) that peak value keeps, indicating value is followed the tracks of, three kinds of mode of operations are preset in measurement, it is characterized in that,
Be milled with two symmetrical planes in the both sides of described measuring stick (2), respectively post two sheet resistance strain gauges (3) on this plane.Strain ga(u)ge (3) connects with bridge circuit (7), the input of its output termination signal amplifier (8), and the output of signal amplifier (8) is connected with the input of the operational amplifier IC1-2 of analog-digital converter (9),
Described analog-digital converter (9) is by P3.1I/O mouth, the P3.2I/O mouth of IC1-2, IC2-1 operational amplifier, triode V1, single-chip microcomputer IC4, and resistance R 4, R5, R6, R7, R8, R9, and capacitor C4, C5, C6 form; Its electrical connection is: after being used to send the P3.1I/O mouth series resistor R9 of detection signal by single-chip microcomputer IC4, connect the base stage of V1 triode, input with operational amplifier IC1-2 behind the collector series resistance R4 of V1 triode is connected, integrating condenser C5 is connected between the input and output of IC1-2 of operational amplifier, the output of IC1-2 is connected with the input of second level operational amplifier IC2-1, and the output of IC2-1 connects the P3.2I/O mouth of single-chip microcomputer IC4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01265982 CN2510241Y (en) | 2001-11-29 | 2001-11-29 | Digital-display torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01265982 CN2510241Y (en) | 2001-11-29 | 2001-11-29 | Digital-display torque wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2510241Y true CN2510241Y (en) | 2002-09-11 |
Family
ID=33672728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01265982 Expired - Fee Related CN2510241Y (en) | 2001-11-29 | 2001-11-29 | Digital-display torque wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2510241Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163614A (en) * | 2011-12-08 | 2013-06-19 | 北京长峰科威光电技术有限公司 | Infrared optics lens pressing ring tool and method for applying tool to install pressing ring |
| CN104142208A (en) * | 2013-05-07 | 2014-11-12 | 施耐宝公司 | Method of Calibrating Torque by Using Peak Hold Measurement on Electronic Torque Wrench |
| WO2014205525A1 (en) * | 2013-06-24 | 2014-12-31 | Nelis Evangelista Luiz - Me | Digital odontological torquemeter |
| CN106826638A (en) * | 2015-12-03 | 2017-06-13 | 哈尔滨市三和佳美科技发展有限公司 | Digital display torque spaner |
| CN108581945A (en) * | 2017-12-26 | 2018-09-28 | 中国航发四川燃气涡轮研究院 | A kind of device and method of assembly studs |
| CN109015506A (en) * | 2018-08-07 | 2018-12-18 | 苏州派尔德工具有限公司 | A kind of torque-indicating wrench and its operating method |
| CN106392958B (en) * | 2016-11-23 | 2019-08-09 | 芜湖协航测控技术有限公司 | The double end torque spanner and torque measuring method that can be used separately |
| CN110394753A (en) * | 2019-08-17 | 2019-11-01 | 五邑大学 | It is a kind of suitable for small space can backhaul digital display type Intelligent spanner |
| CN111136606A (en) * | 2018-11-01 | 2020-05-12 | 施耐宝公司 | Tilt compensation torque-angle wrench |
| CN114131549A (en) * | 2021-12-02 | 2022-03-04 | 上海优拜机械股份有限公司 | All-in-one automatic identification electronic torque wrench and system thereof |
-
2001
- 2001-11-29 CN CN 01265982 patent/CN2510241Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163614A (en) * | 2011-12-08 | 2013-06-19 | 北京长峰科威光电技术有限公司 | Infrared optics lens pressing ring tool and method for applying tool to install pressing ring |
| CN104142208A (en) * | 2013-05-07 | 2014-11-12 | 施耐宝公司 | Method of Calibrating Torque by Using Peak Hold Measurement on Electronic Torque Wrench |
| CN104142208B (en) * | 2013-05-07 | 2017-04-12 | 施耐宝公司 | Method of Calibrating Torque by Using Peak Hold Measurement on Electronic Torque Wrench |
| WO2014205525A1 (en) * | 2013-06-24 | 2014-12-31 | Nelis Evangelista Luiz - Me | Digital odontological torquemeter |
| CN106826638A (en) * | 2015-12-03 | 2017-06-13 | 哈尔滨市三和佳美科技发展有限公司 | Digital display torque spaner |
| CN106392958B (en) * | 2016-11-23 | 2019-08-09 | 芜湖协航测控技术有限公司 | The double end torque spanner and torque measuring method that can be used separately |
| CN108581945A (en) * | 2017-12-26 | 2018-09-28 | 中国航发四川燃气涡轮研究院 | A kind of device and method of assembly studs |
| CN109015506A (en) * | 2018-08-07 | 2018-12-18 | 苏州派尔德工具有限公司 | A kind of torque-indicating wrench and its operating method |
| CN111136606A (en) * | 2018-11-01 | 2020-05-12 | 施耐宝公司 | Tilt compensation torque-angle wrench |
| CN111136606B (en) * | 2018-11-01 | 2021-10-29 | 施耐宝公司 | Tilt compensation torque-angle wrench |
| CN110394753A (en) * | 2019-08-17 | 2019-11-01 | 五邑大学 | It is a kind of suitable for small space can backhaul digital display type Intelligent spanner |
| CN114131549A (en) * | 2021-12-02 | 2022-03-04 | 上海优拜机械股份有限公司 | All-in-one automatic identification electronic torque wrench and system thereof |
| CN114131549B (en) * | 2021-12-02 | 2024-03-29 | 上海优拜机械股份有限公司 | All-in-one automatic identification electronic torque wrench and system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020911 Termination date: 20091229 |