CN202694169U - Moment control and liquid crystal display device of electric torque wrench - Google Patents
Moment control and liquid crystal display device of electric torque wrench Download PDFInfo
- Publication number
- CN202694169U CN202694169U CN 201220372645 CN201220372645U CN202694169U CN 202694169 U CN202694169 U CN 202694169U CN 201220372645 CN201220372645 CN 201220372645 CN 201220372645 U CN201220372645 U CN 201220372645U CN 202694169 U CN202694169 U CN 202694169U
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- series excited
- excited machine
- cpu
- liquid crystal
- torque wrench
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- Expired - Lifetime
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Abstract
The utility model relates to an electric torque wrench, which aims at providing a moment control and liquid crystal display device of an electric torque wrench, with the advantages of small volume, simple operation and reliable performance. The moment control and liquid crystal display device of the electric torque wrench comprises a CPU, a power supply part, a display part, a detection part and an output part which are electrically connected, wherein the power supply part comprises a high-precision power supply changeover module, and is used for achieving power supply changeover and providing power for the CPU, the display part, the detection part and the output part; the display part comprises a display liquid crystal, the display liquid crystal is connected with the CPU and used for setting a parameter and displaying a torque; the detection part comprises a current detection module which is connected with the CPU and used for receiving the control signal of the CPU and achieving the detection to a series excited machine; the output part comprises the series excited machine, a sensor is arranged on the rotor of the series excited machine, and the sensor is used for detecting the rotate speed of the series excited machine, and meanwhile detecting real-time current of the series excited machine. The electric torque wrench has the advantages of small volume, simple operation, and reliable performance, and is suitable for the control system of the electric torque wrench.
Description
Technical field
The utility model relates to a kind of electric torque spanner, relates in particular to a kind of electric torque wrench torque control and liquid crystal indicator.
Background technology
Traditional electric torque spanner adopts current detecting, and potentiometer is regulated the plain mode work of (without liquid crystal) moment size.Major defect has: 1, detect a kind of detection means of electric current, method is single, and precision is low.The individual difference of motor is worked under the specified voltage that coexists, and its electric current is also inconsistent, causes like this moment that detects under the identical conditions also inconsistent; 2, potentiometer itself is a kind of coarse adjustment method, and the size of its moment is just indicated roughly by its high scale, is difficult to reach the requirement of accurate adjusting.Comprehensive two kinds of disadvantages are difficult to regulate control high precision moment.
The utility model content
The purpose of this utility model provides that a kind of volume is little, simple to operate, the control of the electric torque wrench torque of dependable performance and liquid crystal indicator.
In order to address the above problem, the utility model is achieved through the following technical solutions:
Electric torque wrench torque control of the present utility model and liquid crystal indicator comprise the CPU, power unit, display part, test section and the output that are electrically connected;
Power unit comprises the high-precision power conversion module, is used for finishing the power supply conversion and provides stabilized power source to CPU, display part, test section and output;
The display part comprises the demonstration liquid crystal, and this shows that liquid crystal links to each other with CPU, is used for finishing the setting of parameter and the demonstration of moment;
The test section is the core of equipment, comprises current detection module, links to each other with CPU, be used for to receive the control signal of CPU and finishes detection to series excited machine;
Output comprises series excited machine, sensor installation on series excited motor rotor, sensor detects the rotating speed of series excited machine, detect simultaneously the real-time current of series excited machine, control circuit is according to the moment of torsion of given parameter control series excited machine, when rotating speed and electric current reached given setting value, control circuit provides the signal series excited machine to be stopped, and stopped when making series excited machine reach the moment of torsion of setting in the middle of the process of operation.
Compared with prior art; the beneficial effects of the utility model are: owing to adopt rotating speed and the two-parameter control of electric current; this device can accurately be controlled the output torque of series excited machine; and improved greatly the repetitive positioning accuracy of series excited machine output torque; and can accurately control motor rotation and after setting the number of turns, stop, going offline at motor, can protect during the up-set condition such as short circuit or part electric leakage.Whole device volume is little, simple to operate, dependable performance, is applicable to the control system of electric torque spanner.
Description of drawings
Fig. 1 is the schematic diagram of the control of the utility model electric torque wrench torque and liquid crystal indicator.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, a kind of electric torque wrench torque control and liquid crystal indicator comprise the CPU that is electrically connected, and model is ATMEGA48, power unit 1, and display part 2, test section 3 and output 4 form,
Power unit 1 comprises the high-precision power conversion module, is used for finishing the power supply conversion and provides stabilized power source to CPU, display part, test section and output;
Display part 2 comprises the demonstration liquid crystal, and this shows that liquid crystal links to each other with CPU, is used for finishing the setting of parameter and the demonstration of moment;
Test section 3 is cores of equipment, comprises current detection module, links to each other with CPU, be used for to receive the control signal of CPU and finishes detection to series excited machine;
Output 4 comprises series excited machine, sensor installation on series excited motor rotor, sensor detects the rotating speed of series excited machine, detect simultaneously the real-time current of series excited machine, control circuit is according to the moment of torsion of given parameter control series excited machine, when rotating speed and electric current reached given setting value, control circuit provides the signal series excited machine to be stopped, and stopped when making series excited machine reach the moment of torsion of setting in the middle of the process of operation.
The real-time moment of torsion of the parameter display series excited machine that liquid crystal indicator provides according to testing circuit.The reverse signal that sensor by forward-reverse switch or mechanical commutation place when series excited machine reverses transmits, control circuit provide signal and do not control or control series excited machine is worked under maximum current, discharge the peak torque of series excited machine.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (1)
1. an electric torque wrench torque is controlled and liquid crystal indicator, it is characterized in that: comprise the CPU, power unit, display part, test section and the output that are electrically connected;
Power unit comprises the high-precision power conversion module, is used for finishing the power supply conversion and provides stabilized power source to CPU, display part, test section and output;
The display part comprises the demonstration liquid crystal, and this shows that liquid crystal links to each other with CPU, is used for finishing the setting of parameter and the demonstration of moment;
The test section is the core of equipment, comprises current detection module, links to each other with CPU, be used for to receive the control signal of CPU and finishes detection to series excited machine;
Output comprises series excited machine, sensor installation on series excited motor rotor, sensor detects the rotating speed of series excited machine, detect simultaneously the real-time current of series excited machine, control circuit is according to the moment of torsion of given parameter control series excited machine, when rotating speed and electric current reached given setting value, control circuit provides the signal series excited machine to be stopped, and stopped when making series excited machine reach the moment of torsion of setting in the middle of the process of operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372645 CN202694169U (en) | 2012-07-31 | 2012-07-31 | Moment control and liquid crystal display device of electric torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372645 CN202694169U (en) | 2012-07-31 | 2012-07-31 | Moment control and liquid crystal display device of electric torque wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202694169U true CN202694169U (en) | 2013-01-23 |
Family
ID=47549757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220372645 Expired - Lifetime CN202694169U (en) | 2012-07-31 | 2012-07-31 | Moment control and liquid crystal display device of electric torque wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202694169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121120A (en) * | 2013-02-01 | 2013-05-29 | 宁波市海联电器有限公司 | Electric drill |
-
2012
- 2012-07-31 CN CN 201220372645 patent/CN202694169U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121120A (en) * | 2013-02-01 | 2013-05-29 | 宁波市海联电器有限公司 | Electric drill |
| CN103121120B (en) * | 2013-02-01 | 2015-10-28 | 宁波市海联电器有限公司 | Electric drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
|
| CX01 | Expiry of patent term |