CN103878731A - Impact-free digital display intelligent electric torque spanner - Google Patents
Impact-free digital display intelligent electric torque spanner Download PDFInfo
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- CN103878731A CN103878731A CN201410134775.8A CN201410134775A CN103878731A CN 103878731 A CN103878731 A CN 103878731A CN 201410134775 A CN201410134775 A CN 201410134775A CN 103878731 A CN103878731 A CN 103878731A
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000000452 restraining effect Effects 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
- B25B23/1475—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers for impact wrenches or screwdrivers
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses an impact-free digital display intelligent electric torque spanner and belongs to the technical field of electric torque spanners. The torque spanner comprises a keyboard input module, a mechanical switch, a motor, a display module, a 360-degree rotary module, a speed change mechanism, a speed reduction mechanism, a spanner output shaft and a reverse force arm, wherein the 360-degree rotary module comprises a deboosting bearing, a bearing retainer, a bearing press plate, a bearing seat, a reduction box connecting base and a motor output shaft, the motor output shaft vertically stretches into the reduction box connecting base, the motor output shaft is connected with one end of the reduction box connecting base through a motor bearing in a rotary mode, the peripheral lateral wall of the reduction box connecting base is connected with the inner wall of the bearing seat through the deboosting bearing, the bearing retainer is arranged on the upper portion of the deboosting bearing and is used for restraining the deboosting bearing from moving upwards, the bearing press plate is arranged on the lower portion of the deboosting bearing, and the bearing press plate of the deboosting bearing is used for restraining the deboosting bearing from moving downwards. According to the impact-free digital display intelligent electric torque spanner, there is no impact force when the spanner is shut down, and operation is safer.
Description
Technical field
What the present invention relates to is electric torque spanner technical field, more particularly, relates to a kind of without impulsive force digital display intelligent electric torque spanner.
Background technology
Electric torque spanner is generally used for large to bolt or nut dismounting moment of torsion and has an occasion of higher screw-down torque precision.In prior art, electric torque spanner can be divided into two kinds of electric current speed type and dynamic torque sensor formulas.Electric current speed type electric torque spanner judges torque value according to current value and the rotation speed change of machine operation in bolt tightening process, and in the time reaching predetermined value, motor quits work.Dynamic torque sensor formula electric torque spanner is, on spanner output shaft, torque sensor is installed, and detects the variation of torque value, and in the time reaching predetermined moment of torsion, motor quits work.
Electric current speed type electric torque spanner is owing to being subject to electric current, the fluctuation of speed is large, poor anti jamming capability, be that spanner sharply rises at clamp nut immediate current, within this extremely short time, control the shutdown of spanner motor, easily cause motor overshoot, do not shut down in the moment that should shut down, cause moment of torsion control accuracy low, its Ananlysis of main cause is as follows: existing electric current speed type electric torque spanner is that a current maxima of setting is shutdown value, namely end point values, this end point values is a transient current of being caught by sensor in spanner work, once this current value reaches preset value, spanner is with regard to autostop, because the process of nut screwing clamping is subject to the impact that bolt and nut coefficient of friction changes, the impact of environment for use, the variation of current value is nonlinear and has unpredictable row, sometimes current value can become suddenly large, and nut is not also tightened, now spanner has but been shut down.Dynamic torque sensor formula electric torque spanner is due to torque sensor being installed, and spanner appearance and size is large, and to have limited the scope of application simultaneously also uneconomical.
In this external frame for movement, the motor output shaft of current electric torque spanner is directly connected with reducing gear, causes spanner to produce very large impulsive force in the time that the nut that tights a bolt is shut down, and operator is produced to a kind of feeling of risk.In sum, existing electric torque spanner moment of torsion control fluctuation is large, and when spanner work, impulsive force is large.
Summary of the invention
1. the technical problem that invention will solve
The large deficiency of impulsive force while the object of the invention is to overcome in prior art the work of electric torque spanner, provide a kind of without impulsive force digital display intelligent electric torque spanner, adopt technical scheme of the present invention, can greatly improve the usage safety performance of electric torque spanner.
2. technical scheme
For achieving the above object, technical program of the present invention lies in:
One of the present invention is without impulsive force digital display intelligent electric torque spanner, it is characterized in that, electric torque spanner comprises: keyboard input module, mechanical switch, motor, display module, 360 degree rotary modules, gear, reducing gear, spanner output shaft and counter-force arm, the outer setting of described motor has keyboard input module and display module, mechanical switch is positioned on the handle of electric torque spanner, motor, 360 degree rotary modules, gear, reducing gear, spanner output shaft connects from top to bottom successively, motor is through 360 degree rotary modules, gear, the rotation of reducing gear band wrench output shaft, the lower, outer perimeter of reducing gear is provided with counter-force arm, 360 described degree rotary modules comprise that subtracting mechanical axis holds, holds back-up ring, bearing plate, bearing block, reduction box Connection Block and motor output shaft, described motor output shaft vertically stretches into reduction box Connection Block inside, and this motor output shaft is rotationally connected by one end of motor bearings and reduction box Connection Block, between the described outer peripheral sidewall of reduction box Connection Block and the inwall of bearing block, hold and be connected by subtracting mechanical axis, this subtracts top that mechanical axis holds and is provided with and holds back-up ring, the described back-up ring that holds subtracts mechanical axis for restriction and holds and move upward, this subtracts the bottom that mechanical axis holds and is provided with bearing plate, and what described this subtracted that mechanical axis holds subtract mechanical axis for restriction holds and move downward.
Furthermore, the periphery of described reduction box Connection Block offers three circular steps from top to bottom, holds back-up ring and is fixed on uppermost circular step, subtracts mechanical axis and holds the circular step in the middle of being arranged on, and bearing plate is installed on nethermost circular step.
Furthermore, the described back-up ring that holds is fixed by screws on reduction box Connection Block.
Furthermore, it is characterized in that, described bearing plate is fixed by screws on bearing block, and this bearing block is connected with motor.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following remarkable result:
Holding back-up ring and will subtract mechanical axis and hold in the present invention, bearing plate is pressed on the cylinder on reduction box Connection Block successively, and then by bearing plate by this partial fixing on bearing block, like this in the time that electric torque spanner is worked gear can be along motor output shaft rotation until stop the rotation while finding the suitable reaction force strong point, motor output shaft rotates through gear simultaneously, reducing gear is to spanner output shaft transmitting torque, in the time that spanner moment of torsion reaches shutdown, this 360 degree rotary module has been offset partial reaction power, only bear the reaction force of motor part, and motor belongs to the little moment of torsion of high speed, this little moment of torsion is reaction force, this reaction force is very little, in the acceptable reaction force scope of operating personnel, thereby realize spanner shut down time without impulsive force, operate safer.
Brief description of the drawings
Fig. 1 is a kind of structural representation without impulsive force digital display intelligent electric torque spanner of the present invention;
Fig. 2 is a kind of torque control system schematic diagram without impulsive force digital display intelligent electric torque spanner of the present invention;
Fig. 3 is 360 degree rotary module structural representations in electric torque spanner of the present invention;
Fig. 4 is the workflow schematic diagram of a kind of torque control method without impulsive force digital display intelligent electric torque spanner of the present invention.
In figure: keyboard input module 1, mechanical switch 2, motor 3, display module 4,360 degree rotary module 5, gear 6, reducing gear 7, spanner output shaft 8, counter-force arm 9, subtract that mechanical axis holds 51, holds back-up ring 52, bearing plate 53, bearing block 54, reduction box Connection Block 55, motor output shaft 56.
Detailed description of the invention
For further understanding content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Fig. 1 be the one of the present embodiment without impulsive force digital display intelligent electric torque spanner structure schematic diagram, this electric torque spanner comprises torque control system (as shown in Figure 2), this torque control system comprises power supply, voltage sensor module, power control module, mechanical switch, motor, current sensor module, microprocessor module, display module and keyboard input module, wherein: described microprocessor module respectively with voltage sensor module, power control module, mechanical switch, current sensor module, display module, keyboard input module is connected, described keyboard input module is for determining required torque value, required torque value is presented on display module, described voltage sensor module is connected between power supply and microprocessor module, this voltage sensor module is for gathering the voltage signal of power supply, in described microprocessor module, store moment of torsion-power relation data, the normally opened contact closure signal of mechanical switch passes to microprocessor module, microprocessor module obtains the performance number of motor according to required torque value inquiry moment of torsion-power relation data, and driving power control module, motor is according to the performance number rotation of power control module control, described power control module, mechanical switch, motor, current sensor module are connected successively, and current sensor module is used for gathering the operating current signal of motor, and sends the motor working current signal of collection to microprocessor module.
In the present embodiment, power control module comprises LMDS Light Coupled Device, bidirectional thyristor, and LMDS Light Coupled Device has isolation Anti-Jamming, and LMDS Light Coupled Device is directly connected with microprocessor module, and power control module is connected on motor power loop.The power supply voltage signal collecting is transferred to microprocessor module by voltage sensor module, and microprocessor module calculates required power difference according to the difference of this voltage signal and rated voltage, and then the output torque of motor is carried out to power back-off.
Microprocessor module has been stored power-moment of torsion corresponding relation data, the data of keyboard input, the data of demarcation; and there is power-down data protection function; microprocessor module is presented at the torque value of keyboard input on display module; and according to storage power-moment of torsion corresponding relation convert performance number to, trigger power control module according to the power that will provide to motor.Power-moment of torsion corresponding relation data are the data that test out by experiment, the corresponding torque value of each power.
Display module is connected with microprocessor module, and the viewing area of display module is divided into epimere mode of operation information, the main viewing area of stage casing torque value, and hypomere editing mode information.Display module can show 3 kinds of duties: directly torque value input state, select torque condition and call field calibration moment of torsion duty according to the specification strength grade of bolt, these several duties are by keyboard input editing, selection.
The motor working current signal collecting is transferred to microprocessor module by current sensor module; microprocessor module compares gathering the current signal current value corresponding with this power of depositing; if be greater than the current value of storage; thereby microprocessor module switch-off power control module quits work motor, current sensor module is only shut down and is controlled function as spanner.
Mechanical switch is connected on motor power loop, and there is individual normally opened contact to be connected to the upper of microprocessor module, motor power conducting in the time pressing mechanical switch, and the signal that normally opened contact closure is pressed switch passes to microprocessor module, now microprocessor module is raised to required power by the ascending successively increment method of power, realizes the low speed non-impacting start of motor.
As shown in Figure 1, electric torque spanner comprises electric torque spanner frame for movement in the present embodiment: keyboard input module 1, mechanical switch 2, motor 3, display module 4,360 degree rotary modules 5, gear 6, reducing gear 7, spanner output shaft 8 and counter-force arm 9.In the present embodiment, the outer setting of motor 3 has keyboard input module 1 and display module 4, mechanical switch 2 is positioned on the handle of electric torque spanner, motor 3,360 degree rotary modules 5, gear 6, reducing gear 7, spanner output shaft 8 connect from top to bottom successively, motor 3 is with wrench output shaft 8 to rotate through 360 degree rotary modules 5, gear 6, reducing gear 7, and the lower, outer perimeter of reducing gear 7 is provided with counter-force arm 9.In the present embodiment 360 degree rotary module 5 structures as shown in Figure 3, this 360 degree rotary module 5 comprise subtract that mechanical axis holds 51, holds back-up ring 52, bearing plate 53, bearing block 54, reduction box Connection Block 55, motor output shaft 56, described motor output shaft 56 vertically stretches into reduction box Connection Block 55 inside, and this motor output shaft 56 is rotationally connected by one end of motor bearings and reduction box Connection Block 55; Between the outer peripheral sidewall of described reduction box Connection Block 55 and the inwall of bearing block 54, hold 51 and be connected by subtracting mechanical axis, this subtracts mechanical axis and holds 51 top and be provided with and hold back-up ring 52, the described back-up ring 52 that holds subtracts mechanical axis for restriction and holds 51 and move upward, this subtracts mechanical axis and holds 51 bottom and be provided with bearing plate 53, described this subtracts mechanical axis and holds 51 subtract mechanical axis for restriction and hold 51 and move downward, that is: hold back-up ring 52, bearing plate 53 and act on respectively and subtract mechanical axis and hold 51 both sides, prevent from subtracting mechanical axis and hold 51 displacements up and down.Specifically in the present embodiment, the periphery of reduction box Connection Block 55 offers three circular steps from top to bottom, hold back-up ring 52 and be fixed on uppermost circular step, subtract mechanical axis and hold 51 circular steps in the middle of being arranged on, bearing plate 53 is installed on nethermost circular step.And hold back-up ring 52 and be fixed by screws on reduction box Connection Block 55, bearing plate 53 is fixed by screws on bearing block 54, and this bearing block 54 is connected with motor 3.
In the present embodiment, holding back-up ring 52 will subtract mechanical axis and hold 51, bearing plate 53 is pressed on the cylinder on reduction box Connection Block 55 successively, and then by bearing plate 53 by this partial fixing on bearing block 54, in the time that electric torque spanner is worked, gear 6 can rotate along motor output shaft 56 until stop the rotation while finding the suitable reaction force strong point like this, motor output shaft 56 rotates through gear 6 simultaneously, reducing gear 7 is to spanner output shaft 8 transmitting torques, in the time that spanner moment of torsion reaches shutdown, this 360 degree rotary module 5 has been offset partial reaction power, only bear the reaction force of motor 3 parts, and motor 3 belongs to the little moment of torsion of high speed, this little moment of torsion is reaction force, this reaction force is very little, in the acceptable reaction force scope of operating personnel, thereby realize spanner shut down time without impulsive force, operate safer.
As shown in Figure 4, a kind of torque control method without impulsive force digital display intelligent electric torque spanner of the present embodiment, the steps include:
1) select a kind of mode of operation at keyboard input module, determine a required torque value;
2) microprocessor module recalls corresponding performance number according to moment of torsion-power relation;
3) the normally opened contact closure of pressing mechanical switch passes to microprocessor module, microprocessor module driving power control module, motor 3 is with wrench output shaft 8 to rotate by this power through 360 degree rotary modules 5, gear 6, reducing gear 7, and counter-force arm 9, gear 6, reducing gear 7 are made integral-rotation until find the suitable strong point to stop the rotation along motor 3 axis simultaneously; Wherein, mechanical switch is connected on motor power loop, and the normally opened contact of mechanical switch is connected on microprocessor module, motor power conducting in the time pressing mechanical switch, now microprocessor module is raised to required power by the ascending successively increment method of power;
4) voltage signal of voltage sensor collection power supply carries out power back-off to microprocessor module; Wherein, the power supply voltage signal collecting is transferred to microprocessor module by voltage sensor module, and microprocessor module calculates required power difference according to the difference of this voltage signal and rated voltage, and then the output torque of motor is carried out to power back-off;
5) operating current that current sensor gathers motor changes, and in the time reaching current value corresponding to this power of microprocessor module storage, closes power control module, and motor quits work, and relay indicating light goes out, alert release mechanism switch.The current sensor module that the present invention adopts only gathers the current signal of motor during by nut screwing clamping at spanner, that is to say that the object that detects electric current is to control stopping of motor, instead of control the output torque of motor.
In the present embodiment, keyboard input module is connected with microprocessor module, on keyboard input module, have and add, subtract, peak torque output, confirm button, facilitate the input amendment of moment of torsion, use plus-minus button can change the torque value of input, use adds, subtracts, confirms button selectively operating pattern, uses different key combination can realize the variation of different mode of operations, as adds, subtracts key and press simultaneously and can enter moment of torsion calibration interface mode of operation.All mode of operations are finally presented on display module with required moment of torsion, and microprocessor module is found out corresponding performance number by this torque value.
Electric torque spanner of the present invention adopts the corresponding relation between output power of motor and motor output torque, controls spanner through the gear moment of torsion on output shaft endways.The moment of pressing at spanner mechanical switch has just been determined the power of motor, in the time that handle switch is pressed beginning, the moment of torsion with a corresponding power control spanner is exported, instead of in the spanner course of work, gather the moment of torsion of the signal controlling such as electric current, rotating speed spanner, carry out power back-off with the voltage pulsation of voltage sensor module Real-time Collection power supply simultaneously, thereby the control of spanner torque value is stable, and meet the requirement of electrodeless adjustment output torque, improve spanner output torque control accuracy.
In the present invention, electric torque spanner also comprises a torsion moment on the scene calibration system.Because of the difference of work on the spot environment, the difference of bolt and nut coefficient of friction, specification strength grade, the not equal factor whether packing ring, temperature are installed between bolt and nut causes spanner moment of torsion output bias, and the electric torque spanner of the present embodiment provides a torsion moment on the scene real-time calibration system for this reason.User inputs after required torque value, system provides a modifiable operation interface of power, determine needed power by repeatedly trying several times to tight a bolt, and this moment of torsion-power corresponding relation is kept in microprocessor module, this moment of torsion-power relation value can be preserved several groups to tens groups, facilitates scene to call at any time.Existing technical calibration process has normally been completed by manufacturer, needs professional to carry out, and operating personnel are not had to moment of torsion calibration interface, and torsion moment on the scene calibration system of the present invention provides a moment of torsion calibration interface, can be completed by operating personnel.
The electric torque spanner of the present embodiment is a kind of adjusting torque input, multiple-working mode, electrodeless power control, have can real-time calibration function without impulsive force electric torque spanner, this spanner belongs to process control to the control of torque value, the control accuracy of torque value is high, repeatability is high, and the uniformity of product is strong.
Below schematically the present invention and embodiment thereof are described, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that not departing from the invention aim, without the creationary frame mode similar to this technical scheme and the embodiment of designing, all should belong to protection scope of the present invention.
Claims (4)
1. one kind without impulsive force digital display intelligent electric torque spanner, it is characterized in that, electric torque spanner comprises: keyboard input module (1), mechanical switch (2), motor (3), display module (4), 360 degree rotary modules (5), gear (6), reducing gear (7), spanner output shaft (8) and counter-force arm (9), the outer setting of described motor (3) has keyboard input module (1) and display module (4), mechanical switch (2) is positioned on the handle of electric torque spanner, motor (3), 360 degree rotary modules (5), gear (6), reducing gear (7), spanner output shaft (8) connects from top to bottom successively, motor (3) is through 360 degree rotary modules (5), gear (6), reducing gear (7) band wrench output shaft (8) rotation, the lower, outer perimeter of reducing gear (7) is provided with counter-force arm (9),
Described 360 degree rotary modules (5) comprise subtract that mechanical axis holds (51), hold back-up ring (52), bearing plate (53), bearing block (54), reduction box Connection Block (55) and motor output shaft (56), described motor output shaft (56) vertically stretches into reduction box Connection Block (55) inside, and this motor output shaft (56) is rotationally connected by one end of motor bearings and reduction box Connection Block (55); Between the outer peripheral sidewall of described reduction box Connection Block (55) and the inwall of bearing block (54), be connected by subtracting mechanical axis and holding (51), this subtracts top that mechanical axis holds (51) and is provided with and holds back-up ring (52), the described back-up ring (52) that holds subtracts mechanical axis for restriction and holds (51) and move upward, this subtracts the bottom that mechanical axis holds (51) and is provided with bearing plate (53), and described this subtracts mechanical axis and hold subtracting mechanical axis for restriction and holding (51) and move downward of (51).
2. one according to claim 1 is without impulsive force digital display intelligent electric torque spanner, it is characterized in that, the periphery of described reduction box Connection Block (55) offers three circular steps from top to bottom, hold back-up ring (52) and be fixed on uppermost circular step, subtract mechanical axis and hold (51) circular step in the middle of being arranged on, bearing plate (53) is installed on nethermost circular step.
3. one according to claim 1, without impulsive force digital display intelligent electric torque spanner, is characterized in that, the described back-up ring (52) that holds is fixed by screws on reduction box Connection Block (55).
According to the one described in claim 1 or 2 or 3 without impulsive force digital display intelligent electric torque spanner, it is characterized in that, it is upper that described bearing plate (53) is fixed by screws in bearing block (54), this bearing block (54) is connected with motor (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134775.8A CN103878731B (en) | 2014-04-03 | 2014-04-03 | A kind of without impulsive force digital display intelligent electric torque spanner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134775.8A CN103878731B (en) | 2014-04-03 | 2014-04-03 | A kind of without impulsive force digital display intelligent electric torque spanner |
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| CN103878731A true CN103878731A (en) | 2014-06-25 |
| CN103878731B CN103878731B (en) | 2016-05-25 |
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| CN201410134775.8A Active CN103878731B (en) | 2014-04-03 | 2014-04-03 | A kind of without impulsive force digital display intelligent electric torque spanner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618768A (en) * | 2017-01-16 | 2017-05-10 | 广州市健齿生物科技有限公司 | Dental implant operation wrench with function of overload protection |
| CN108527235A (en) * | 2018-06-22 | 2018-09-14 | 安徽大学 | Intelligent torque wrench |
| CN108621071A (en) * | 2018-03-28 | 2018-10-09 | 宁波海天精工股份有限公司 | Clamp nut automatic fastening method based on Electric torque wrench |
| CN110142718A (en) * | 2019-05-20 | 2019-08-20 | 神华铁路货车运输有限责任公司 | Bolt disassembly device |
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| CN203738691U (en) * | 2014-04-03 | 2014-07-30 | 胡井湖 | Intelligent non-impact digital display power-driven torque spanner |
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| US4546833A (en) * | 1983-12-27 | 1985-10-15 | Microdot Inc. | Adjustable torque responsive control |
| EP0174276A1 (en) * | 1984-09-03 | 1986-03-12 | HILTI Aktiengesellschaft | Power screwing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618768A (en) * | 2017-01-16 | 2017-05-10 | 广州市健齿生物科技有限公司 | Dental implant operation wrench with function of overload protection |
| CN108621071A (en) * | 2018-03-28 | 2018-10-09 | 宁波海天精工股份有限公司 | Clamp nut automatic fastening method based on Electric torque wrench |
| CN108527235A (en) * | 2018-06-22 | 2018-09-14 | 安徽大学 | Intelligent torque wrench |
| CN110142718A (en) * | 2019-05-20 | 2019-08-20 | 神华铁路货车运输有限责任公司 | Bolt disassembly device |
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| Publication number | Publication date |
|---|---|
| CN103878731B (en) | 2016-05-25 |
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