CN109968265A - Electric tool and its control method and device - Google Patents
Electric tool and its control method and device Download PDFInfo
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- CN109968265A CN109968265A CN201711462526.1A CN201711462526A CN109968265A CN 109968265 A CN109968265 A CN 109968265A CN 201711462526 A CN201711462526 A CN 201711462526A CN 109968265 A CN109968265 A CN 109968265A
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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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention provides a kind of electric tool and its control method and devices, and the method includes obtaining the first parameter of at least one for indicating the electric tool working condition；The working time is determined according at least one first parameter；Whether the monitoring load condition duration of operation reaches the working time；When the load condition duration of operation reaching the working time, the torque output of the electric tool is interrupted.
Description
Technical field
The present invention relates to field of power tools, and in particular to a kind of electric tool and its control method and device.
Background technique
Electric wrench is that electric current is provided by the power supply of load come driving motor rotation, so that work head be made to rotate to spiral shell
The electric tool that bolt is fastened.Different types of bolt has different main diameters, or with different head shapes,
In this way, it is also different with the fastening situation of nut.Usually in the use process of electric wrench, user needs very small
Heart pays close attention to fastener cycle, to control motor stalling when bolts and nuts are combined closely.
It constructs under scene in tunnel, bridge etc., has higher quantitative requirement, electric tool for the screw-down torque of fastener
The torque of output must control in more accurate range.In actual conditions, due to factors such as the operating habit of user, environment
It will affect the screw-down torque of fastener, the experience that existing electric tool control mode relies primarily on operator is manually controlled
It is insufficient to thereby result in torque output control accuracy for system.
Summary of the invention
Therefore, the present invention is to solve existing electric tool control mode is insufficient to the accuracy of torque output control
The problem of.
In view of this, the present invention provides a kind of electric tool control method, comprising:
Obtain the first parameter of at least one for indicating the electric tool working condition；
The working time is determined according at least one first parameter；
Whether the monitoring load condition duration of operation reaches the working time；
When the load condition duration of operation reaching the working time, the torque for interrupting the electric tool is defeated
Out.
Preferably, the step of the acquisition is for indicating at least one first parameter of the electric tool working condition
Before, further includes:
Obtain at least one second parameter for indicating the electric tool working condition；
Judge whether the output shaft of the electric tool is in load condition according at least one described second parameter；
When the output shaft is in load condition, the acquisition is executed for indicating the electric tool working condition
The step of at least one first parameter.
Preferably, described at least one second parameter according to judges whether the output shaft of the electric tool is in negative
The step of load state, comprising:
Calculate the average value of at least one second parameter；
Judge whether the output shaft is in load condition according to the average value.
Preferably, second parameter is the working current value of motor.
Preferably, the number of species of first parameter are a kind, described to determine work according at least one first parameter
The step of making the time, comprising:
Determine preset parameter range locating for first parameter；
Determine the working time corresponding to preset parameter range locating for first parameter.
Preferably, the preset parameter range has multiple, and the different preset parameter ranges corresponding working time is not identical.
Preferably, the corresponding relationship negative correlation of the preset parameter range and the working time.
Preferably, the number of species of first parameter are at least 2 kinds, described true according at least one first parameter
The step of determining the working time, comprising:
Determine the preset function relational expression about a variety of first parameters and working time,
According to the value of every kind of first parameter and corresponding preset function relational expression designated firing duration.
Preferably, the corresponding relationship negative correlation of first parameter and the working time.
Preferably, first parameter is supply voltage and motor working current, and the working time and the power supply are electric
Pressure and the motor working current are in functional relation t=f (U, I), and wherein t is the working time, and U is the value of supply voltage, I
For the value of the motor working current.
Correspondingly, the present invention also provides a kind of electric tool control devices, comprising:
First acquisition unit, for obtaining the first parameter of at least one for indicating the electric tool working condition；
Determination unit, for determining the working time according at least one first parameter；
Monitoring unit, for monitoring whether the load condition duration of operation reaches the working time；
Execution unit, for interrupting the electricity when the load condition duration of operation reaching the working time
The torque of power driven tools exports.
Preferably, further includes:
Second acquisition unit, for obtaining for indicating the electric tool before first acquisition unit starting
At least one second parameter of working condition；
Judging unit, for judging whether the output shaft of the electric tool is according at least one described second parameter
Load condition；
Start unit, for starting the first acquisition unit when the output shaft is in load condition.
Preferably, the judging unit, comprising:
Computing unit, for calculating the average value of at least one second parameter；
Judging unit, for judging whether the output shaft is in load condition according to the average value.
Preferably, second parameter is the working current value of motor.
Preferably, the number of species of first parameter are a kind, and the determination unit includes:
Parameter area determination unit determines preset parameter range locating for first parameter；
Time determination unit, for determining the working time corresponding to preset parameter range locating for first parameter.
Preferably, the preset parameter range has multiple, and the different preset parameter ranges corresponding working time is not identical.
Preferably, the corresponding relationship negative correlation of the preset parameter range and the working time.
Preferably, the number of species of first parameter are at least 2 kinds, and the determination unit includes:
Pre-determined factor determination unit, for determining the preset function relational expression about a variety of first parameters and working time,
Time calculating unit, when for calculating work according to the value of every kind of first parameter and corresponding preset function relational expression
Between.
Preferably, the corresponding relationship negative correlation of first parameter and the working time.
Preferably, first parameter is supply voltage and motor working current, and the working time and the power supply are electric
Pressure and the motor working current are in functional relation t=f (U, I), and wherein t is the working time, and U is the value of supply voltage, I
For the value of the motor working current.
The present invention also provides a kind of electric tool, including motor and output shaft, the motor is described defeated for driving
Shaft movement: controller, the torque for controlling the output shaft according to above-mentioned electric tool control method and device export.
The electric tool and its control method and device provided according to the present invention, by obtaining for indicating the electronic work
Have the first parameter of at least one of working condition, can determine the electric power thus supplied of electric tool, is then determined according to the first parameter
Working time, and make electric tool according to torque output is interrupted after working time operating, scheme provided by the invention can be with
The corresponding working time is set under various electric power thus supplieds, fastener is made to reach consistent tightness, thus improves torque
Export the accuracy of control.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of the electric tool control method in first embodiment of the invention；
Fig. 2 is the flow chart of the electric tool control method in second embodiment of the invention；
Fig. 3 is the structural schematic diagram of the electric tool control device in third embodiment of the invention；
Fig. 4 is the structural schematic diagram of the electric tool in fourth embodiment of the invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection "
It shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can also be two elements indirectly connected through an intermediary
Internal connection, can be wireless connection, is also possible to wired connection.It for the ordinary skill in the art, can be with
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Control method of the invention can be applied to a plurality of types of electric tools, with electric wrench be mainly below specific real
The mode of applying is illustrated.
An embodiment provides a kind of electric tool control methods, as shown in Figure 1, this method includes as follows
Step:
S1, obtains the first parameter of at least one for indicating the electric tool working condition, the parameter include it is a variety of,
Such as any one or more of parameter such as can take supply voltage, power, battery capacity, measurement method can be with fixed week
Phase is sampled.Present invention could apply to use portable dam of the battery pack as power supply, wired company also can be applied to
Connect the common electric tool of fixed power source.For the tool of wired connection fixed power source, fixed power source is likely to occur voltage wave
Dynamic situation；For the tool using battery pack power supply, the electricity of battery pack can be consumed with the work of motor, and battery pack
Voltage can reduce with the decline of battery pack electricity.
It in an alternative embodiment, can be using this kind of parameter of voltage value of power supply as the first parameter, when electronic
When tool is in load condition, battery pack electricity is different, and voltage has differences.
S2 determines the working time according at least one first parameter, and the working time in the embodiment of the present invention refers to
Duration.Specific method of determination includes a variety of, such as can calculate work according to voltage value according to preset algorithm
Time can also determine schedule operating time corresponding with the voltage value currently measured according to preset corresponding relationship.
The relationship of working time and voltage value can be according to the determination of test of many times data, and the determining working time can make electricity herein
Fastener is reached desired tightness by wrench.
Whether S3, the monitoring load condition duration of operation reach the working time, such as institute is true in above-mentioned steps
The fixed working time is N second, then whether the duration of operation of monitoring load condition reaches N seconds since current time, when reaching
Step S4 is executed when by N seconds, is otherwise continued to monitor；
S4, the torque output namely load condition for interrupting the electric tool interrupt torque output when reaching N seconds.Torque
Can be interrupted with one or more different modes, including but not limited to interrupt to motor power, be reduced to motor power,
Effective brake motor actuates the mechanical clutch being arranged between motor and output shaft.In one exemplary embodiment, it turns round
Square is interrupted by braking motor, so that nut is screwed to required torque range.
The electric tool control method provided according to embodiments of the present invention, by obtaining for indicating the electric tool work
The first parameter of at least one for making state, can determine the electric power thus supplied of electric tool, then determine work according to the first parameter
Time, and make electric tool according to torque output is interrupted after working time operating, scheme provided by the invention can be each
The corresponding working time is set under kind electric power thus supplied, fastener is made to reach consistent tightness, is thus exported to improve torque
The accuracy of control.
As a preferred embodiment, in the case where selecting a kind of unique first parameter, above-mentioned steps S2 can be with
Specifically comprise the following steps:
S21 determines preset parameter range locating for first parameter, such as judges the load shape of current electric tool
Whether state operating voltage U is among a certain preset parameter range, and in order to adapt to different operating conditions, preset parameter range is preferably
It is multiple, and each preset parameter range respectively corresponds each working time, it is assumed that there is N number of preset parameter range, then it is right respectively
It answers N number of working time T1 ... Tn, T1 ... Tn can be different, it is identical to be also possible to part.
S22 determines the working time corresponding to preset parameter range locating for first parameter, it is assumed that in step S21
Middle determining operating voltage is in a certain preset parameter range, i.e. U ∈ Un, and Un corresponds to Tn, then can determine work in this step
Making the time is Tn, namely is thought under the corresponding operating condition of U, and the output shaft of electric tool continues working Tn, and fastener can be arranged
For desired tightness.
Preset parameter range and its corresponding working time have marked off multiple gears, according to current operating voltage
The gear for determining electric tool makes electric tool continue the corresponding working time, thus makes electric tool under different gears
Various working is adapted to, and the torque for exporting it under identical operating condition is fixed, and is thus reached and is determined torsion effect, and electronic work is improved
The stability of tool.
Further, the corresponding relationship negative correlation of the preset parameter range and the working time, such as can
To be the relationship being inversely proportional, nonlinear negative correlativing relation can also be, it is corresponding default when choosing different types of first parameter
Different corresponding relationship curves, such as segmented relationship, linear relationship etc. can be implemented from the working time in parameter area.Namely work as
Relationship between above-mentioned N number of preset parameter range be U1 < U2 < ... when Un-1 < Un, the relationship of T1 ... Tn is T1 > T2
> ... Tn-1 > Tn, so that the corresponding working time Tmin of biggish operating voltage value Umax is less than lesser voltage value
The corresponding working time Tmax of Umin.
Above-mentioned preferred embodiment increases the working time of electric tool with the reduction of the first parameter, when electric tool
When electric quantity of power supply is smaller, extend the torque output time of electric tool, so that electric tool still can incite somebody to action after electricity decline
Fastener is reinforced to expected tightness.
It should be noted that the corresponding relationship of the first parameter and working time are not limited to aforesaid way, in other
Under application scenarios, such as when battery capacity decline, in order to achieve the purpose that save electricity or extend total working time,
Corresponding relationship namely the preset parameter range that the two can be arranged in an opposite way are corresponding with the working time
Relationship correlation is also feasible.
Another embodiment of the invention additionally provides a kind of electric tool control method, as shown in Fig. 2, this method includes
Following steps:
S ' 1, obtains at least one second parameter for indicating the electric tool working condition, which includes more
Kind, such as electric current, voltage, revolving speed for can be electric tool motor etc., measurement method can be to be sampled with the fixed cycle.
Second parameter can be with the above-mentioned diverse parameter of first parameter, be also possible to the parameter of identical type, in the present embodiment
In preferably using motor working current value as the second parameter.
S ' 2 judges whether the output shaft of electric tool is in load condition according at least one described second parameter, works as electricity
When power driven tools start, operating current may change at any time, may determine that electric tool is according to the size of current value
In load condition or light condition.Theoretically acquisition primary current value can be judged, but in view of electric tool exists
Inrush current phenomenon is likely to occur when starting, in order to more accurately judge that load condition, the present embodiment are preferably multi collect electric current
The average value of value I1 ... In, the In that then calculates I1 ...Then according to average valueDetermine whether for load condition, such as
It can be by average valueIt is compared with predetermined threshold I0, whenWhen, it is determined as load condition.When the output shaft is in
When load condition, step S ' 3 is executed, is otherwise continued to monitor.
Calculate average value algorithm include it is a variety of, such as arithmetic mean algorithm, sliding average algorithm, geometrical average method,
Weighted Average Algorithm etc., the present invention can using in a variety of average algorithms any one or a variety of to combine calculating average
Value.
S ' 3 obtains the first parameter of at least one for indicating the electric tool working condition, not with previous embodiment
2 kinds or parameter of more than two kinds can be selected as the first parameter with, the present embodiment, such as supply voltage can be selected
With both parameters of motor working current.
S ' 4 determines the working time according at least one first parameter.Selecting two or more parameter
In the case of, using the preset functional relation t=f (the first parameter) of selected a variety of first parameters and the working time
Carry out designated firing duration, one can be calculated by bringing the functional relation by the value for a variety of first parameters that will test
The value of a working time, i.e., the described working time.The present embodiment makes a reservation for preferably by selected a variety of first parameters and accordingly
Coefficient designated firing duration, i.e. preset function relational expression are t=k1(the 1st kind of the first parameter)+k2(the 2nd kind of the first parameter)+kn
(n running parameter)+C, wherein kiFor pre-determined factor, C is predetermined constant.Such as select supply voltage and motor working current
In the case where both parameters, working time and supply voltage and motor working current are in functional relation t=f (U, I), the function
It can be binary linear function, Binary quadratic functions etc., such as can be with are as follows:
T=k1×U+k2× I,
Wherein t is the working time, and U is supply voltage, k1It is pre-determined factor corresponding with supply voltage, I is motor work
Electric current, k2It is pre-determined factor corresponding with power work electric current.The pre-determined factor can reach desired tight according to fastener
Gu degree and working time and the corresponding relationship of the first parameter are preset.
Further, the corresponding relationship negative correlation of first parameter and the working time, such as can be
The relationship being inversely proportional can also be nonlinear negative correlativing relation, and different types of first parameter and working time can be implemented not
Same corresponding relationship curve, such as segmented relationship, linear relationship etc..
Whether S ' 5, the monitoring load condition duration of operation reach the working time, such as institute is true in above-mentioned steps
The fixed working time is N second, then whether the monitoring load condition duration of operation reaches N seconds since current time, when reaching N
Step S ' 6 is executed when the second, is otherwise continued to monitor；
S ' 6, the torque output namely load condition for interrupting the electric tool interrupt torque output when reaching N seconds.Torque
Can be interrupted with one or more different modes, including but not limited to interrupt to motor power, be reduced to motor power,
Effective brake motor actuates the mechanical clutch being arranged between motor and output shaft.In one exemplary embodiment, it turns round
Square is interrupted by braking motor, so that nut is screwed to required torque range.
The electric tool control method provided according to embodiments of the present invention is sentenced by obtaining the second parameter of electric tool
Whether power-off power driven tools are in load condition, when it is in load condition, determine its working time according to the first parameter, when negative
When load state duration reaches the determining working time, the output of its torque is interrupted, thus avoids being in zero load in electric tool
It carries out moment of torsion control under state, thus improves control efficiency.
Third embodiment of the invention provides a kind of electric tool control device, as shown in figure 3, the device includes:
First acquisition unit 31, for obtaining the ginseng of at least one first for indicating the electric tool working condition
Number；
Determination unit 32, for determining the working time according at least one first parameter；
Monitoring unit 33, for monitoring whether the load condition duration of operation reaches the working time；
Execution unit 34, for when the load condition duration of operation reaching the working time, described in interruption
The torque of electric tool exports.
The electric tool control device provided according to embodiments of the present invention, by obtaining for indicating the electric tool work
The first parameter of at least one for making state, can determine the electric power thus supplied of electric tool, then determine work according to the first parameter
Time, and make electric tool according to torque output is interrupted after working time operating, scheme provided by the invention can be each
The corresponding working time is set under kind electric power thus supplied, fastener is made to reach consistent tightness, is thus exported to improve torque
The accuracy of control.
Preferably, which can also include:
Second acquisition unit 301, for obtaining for indicating the electricity before first acquisition unit starting
At least one second parameter of power driven tools working condition；
Judging unit 302, for judged according at least one described second parameter the electric tool output shaft whether
In load condition；
Start unit 303, for starting the first acquisition unit when the output shaft is in load condition.
Above-mentioned preferred embodiment judges whether electric tool is in load condition by obtaining the second parameter of electric tool,
When it is in load condition, its working time is determined according to the first parameter, reaches determining work when the load condition duration
When making the time, the output of its torque is interrupted, thus avoids carrying out moment of torsion control in the case where electric tool is in light condition, is thus mentioned
High control efficiency.
Preferably, the judging unit 302 may include:
Computing unit, for calculating the average value of at least one second parameter；
Judging unit, for judging whether the output shaft is in load condition according to the average value.
Above-mentioned preferred embodiment determines whether electric tool is in load condition using the average value of the second parameter, thus comes
Improve the accuracy of decision.
Preferably, the number of species of first parameter are a kind, and the determination unit 32 may include:
Parameter area determination unit determines preset parameter range locating at least one first parameter；
Time determination unit, for determining work corresponding to preset parameter range locating at least one first parameter
Make the time.
Preset parameter range and its corresponding working time in above-mentioned preferred embodiment have marked off multiple gears, according to working as
Preceding operating voltage is the gear that can determine electric tool, under different gears, when electric tool being made to continue to work accordingly
Between, so that electric tool is adapted to various working, and the torque for exporting it under identical operating condition is fixed, thus reaches fixed
Effect is turned round, the stability of electric tool is improved.
Preferably, the preset parameter range has multiple, and the different preset parameter ranges corresponding working time is not identical.
Preferably, the corresponding relationship negative correlation of the preset parameter range and the working time.
Preferably, the number of species of first parameter are at least 2 kinds, and the determination unit 32 includes:
Pre-determined factor determination unit, for determining the preset function relational expression about a variety of first parameters and working time；
Time calculating unit, when for calculating work according to the value of every kind of first parameter and corresponding preset function relational expression
Between.
In the present embodiment, preferably by selected a variety of first parameters and corresponding pre-determined factor designated firing duration.
Preferably, the corresponding relationship negative correlation of first parameter and the working time.
Preferably, first parameter includes the voltage value of power supply, battery pack electricity, power work current value, motor
Operating current, second parameter are the working current value of motor.
Fourth embodiment of the invention provides a kind of electric tool, as shown in Figure 4 includes motor 41 and output shaft 42, institute
Motor 41 is stated for driving the output shaft 42 to move.The electric tool further include: controller 43, for according to above-described embodiment
The method of offer controls the torque output of the output shaft 42.
Electric tool provided in an embodiment of the present invention is obtained by processor for indicating the electric tool working condition
The first parameter of at least one, can determine the electric power thus supplied of electric tool, then processor determines work according to the first parameter
Time, and make output shaft according to torque output is interrupted after working time operating, scheme provided by the invention can be various
The corresponding working time is set under electric power thus supplied, fastener is made to reach consistent tightness, is thus controlled to improve torque output
The accuracy of system.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (21)
1. a kind of electric tool control method characterized by comprising
Obtain the first parameter of at least one for indicating the electric tool working condition；
The working time is determined according at least one first parameter；
Whether the monitoring load condition duration of operation reaches the working time；
When the load condition duration of operation reaching the working time, the torque output of the electric tool is interrupted.
2. the method according to claim 1, wherein obtaining described for indicating the electric tool work shape
Before the step of at least one first parameter of state, further includes:
Obtain at least one second parameter for indicating the electric tool working condition；
Judge whether the output shaft of the electric tool is in load condition according at least one described second parameter；
When the output shaft is in load condition, the acquisition is executed for indicating the electric tool working condition at least
A kind of the step of first parameter.
3. according to the method described in claim 2, it is characterized in that, described in the judgement of described at least one second parameter according to
The step of whether output shaft of electric tool is in load condition, comprising:
Calculate the average value of at least one second parameter；
Judge whether the output shaft is in load condition according to the average value.
4. according to the method described in claim 3, it is characterized in that, second parameter is the working current value of motor.
5. the method according to claim 1, wherein the number of species of first parameter be a kind, the basis
The step of at least one first parameter determines the working time, comprising:
Determine preset parameter range locating for first parameter；
Determine the working time corresponding to preset parameter range locating for first parameter.
6. according to the method described in claim 5, it is characterized in that, the preset parameter range has multiple, different default ginsengs
The number range corresponding working time is not identical.
7. according to the method described in claim 6, it is characterized in that, the preset parameter range is corresponding with the working time
Relationship negative correlation.
8. described the method according to claim 1, wherein the number of species of first parameter are at least 2 kinds
The step of determining the working time according at least one first parameter, comprising:
Determine the preset function relational expression about a variety of first parameters and working time,
According to the value of every kind of first parameter and corresponding preset function relational expression designated firing duration.
9. according to the method described in claim 8, it is characterized in that, the corresponding relationship of first parameter and the working time
Negative correlation.
10. method according to claim 8 or claim 9, which is characterized in that first parameter is that supply voltage and motor work
Electric current, the working time and the supply voltage and the motor working current are in functional relation t=f (U, I), and wherein t is
The working time, U are the value of supply voltage, and I is the value of the motor working current.
11. a kind of electric tool control device characterized by comprising
First acquisition unit, for obtaining the first parameter of at least one for indicating the electric tool working condition；
Determination unit, for determining the working time according at least one first parameter；
Monitoring unit, for monitoring whether the load condition duration of operation reaches the working time；
Execution unit, for interrupting the electronic work when the load condition duration of operation reaching the working time
The torque of tool exports.
12. device according to claim 11, which is characterized in that further include:
Second acquisition unit, for before first acquisition unit starting, obtaining for indicating the electric tool work
At least one second parameter of state；
Judging unit, for judging whether the output shaft of the electric tool is in load according at least one described second parameter
State；
Start unit, for starting the first acquisition unit when the output shaft is in load condition.
13. device according to claim 12, which is characterized in that the judging unit, comprising:
Computing unit, for calculating the average value of at least one second parameter；
Judging unit, for judging whether the output shaft is in load condition according to the average value.
14. device according to claim 13, which is characterized in that second parameter is the working current value of motor.
15. device according to claim 11, which is characterized in that the number of species of first parameter are a kind, described true
Order member includes:
Parameter area determination unit determines preset parameter range locating for first parameter；
Time determination unit, for determining the working time corresponding to preset parameter range locating for first parameter.
16. device according to claim 15, which is characterized in that the preset parameter range have it is multiple, it is different default
The parameter area corresponding working time is not identical.
17. device according to claim 16, which is characterized in that pair of the preset parameter range and the working time
It should be related to negative correlation.
18. device according to claim 11, which is characterized in that the number of species of first parameter are at least 2 kinds, institute
Stating determination unit includes:
Pre-determined factor determination unit, for determining the preset function relational expression about a variety of first parameters and working time,
Time calculating unit, for according to every kind of first parameter value and corresponding preset function relational expression designated firing duration.
19. device according to claim 18, which is characterized in that first parameter is corresponding with the working time to close
It is negative correlation.
20. device described in 8 or 19 according to claim 1, which is characterized in that first parameter is supply voltage and motor work
Make electric current, the working time and the supply voltage and the motor working current is in functional relation t=f (U, I), wherein t
For the working time, U is the value of supply voltage, and I is the value of the motor working current.
21. a kind of electric tool, including motor and output shaft, the motor is for driving the output shaft to move, feature
It is, further includes: controller controls the torque of the output shaft for method according to claim 1 to 10
Output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462526.1A CN109968265B (en) | 2017-12-28 | 2017-12-28 | Electric tool and control method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462526.1A CN109968265B (en) | 2017-12-28 | 2017-12-28 | Electric tool and control method and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109968265A true CN109968265A (en) | 2019-07-05 |
| CN109968265B CN109968265B (en) | 2021-02-09 |
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| CN103264370A (en) * | 2013-06-04 | 2013-08-28 | 鲁周波 | Torsion automatic-controlling system used for electric screw driver |
| CN105320168A (en) * | 2014-07-31 | 2016-02-10 | 中国气动工业股份有限公司 | Torque control method and torque control device thereof |
| CN106483846A (en) * | 2015-09-01 | 2017-03-08 | 苏州宝时得电动工具有限公司 | The control method of electric tool and the electric tool executing this control method |
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| CN1145842A (en) * | 1995-07-11 | 1997-03-26 | 全台系统株式会社 | Method for tightening a bolt with optimum time |
| JPH10109276A (en) * | 1996-10-03 | 1998-04-28 | Nippon Electric Ind Co Ltd | Screw fastner |
| JP2001009750A (en) * | 1999-06-30 | 2001-01-16 | Tohnichi Mfg Co Ltd | Information offering method at screw fastening work time |
| JP2008279589A (en) * | 2006-10-03 | 2008-11-20 | Sharp Corp | Screw fastening number control system, screw fastening number control method, program for executing the method by computer, and recording medium recording the program |
| CN103264370A (en) * | 2013-06-04 | 2013-08-28 | 鲁周波 | Torsion automatic-controlling system used for electric screw driver |
| CN105320168A (en) * | 2014-07-31 | 2016-02-10 | 中国气动工业股份有限公司 | Torque control method and torque control device thereof |
| CN106483846A (en) * | 2015-09-01 | 2017-03-08 | 苏州宝时得电动工具有限公司 | The control method of electric tool and the electric tool executing this control method |
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