CN107580877A - Power tool and its control method - Google Patents
Power tool and its control method Download PDFInfo
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- CN107580877A CN107580877A CN201610550565.6A CN201610550565A CN107580877A CN 107580877 A CN107580877 A CN 107580877A CN 201610550565 A CN201610550565 A CN 201610550565A CN 107580877 A CN107580877 A CN 107580877A
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- motor
- power tool
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- detecting element
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 241001465754 Metazoa Species 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims abstract description 17
- 244000025254 Cannabis sativa Species 0.000 abstract description 11
- 239000004575 stone Substances 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 3
- 230000035772 mutation Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010019196 Head injury Diseases 0.000 description 1
- 244000173297 Medicago polymorpha Species 0.000 description 1
- 235000017823 Medicago polymorpha Nutrition 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Abstract
The present invention relates to a kind of power tool and its control method, power tool includes work head, motor, control device and detecting element, work head is rotated by with the motor connection and in the motor, detecting element electrically connects with the motor, for being acquired to the operating parameter values of power tool；Control device electrically connects with the motor and the detecting element respectively, for receiving the operating parameter values of the detecting element feedback and judging whether the operating parameter values exceed default reference parameter value, and when the operating parameter values of collection exceed the default reference parameter value, controlled motor drives the work head to stop operating or be down to safe speed of rotation by working speed and rotated.When the work head of above-mentioned power tool runs into barrier, human body or animal in the course of the work, it can prevent work head from continuing to touch human body, animal or barrier with faster work rotation, drive the debris such as stone, grass cuttings to splash, human body or animal etc. is come to harm.
Description
Technical field
The present invention relates to handheld tool technical field, more particularly to a kind of power tool and its control method.
Background technology
At present, community's greening installation is increasingly valued by people, and lawn greening scope also increases while increase
The workload to cut the grass on a lawn.The length of grass of being cut the grass on a lawn, controlled using grass-mowing machine is important one in afforestation maintenance work
Ring.Portable grass trimmer of the prior art, it is to cut blade of grass by the moving head of rotation that it, which trims principle, but is beaten using
During careless machine, the moving head of rotation can be potentially encountered barrier, human body or animal, the debris such as stone, grass cuttings is splashed,
Mechanical wounding is produced to human body or animal.
However, existing power tool in order to ensure the safety of user, the mounting strap on power tool, prevents debris
Splash, prevent moving head injury human body or the animal of rotation, but the protection domain of shield is limited, can not fundamentally be excluded
Potential safety hazard.
The content of the invention
Based on this, it is necessary to the problem of can not fundamentally excluding potential safety hazard for existing power tool, there is provided one
Kind power tool and its control method.
A kind of power tool, including work head, motor, control device and detecting element, the work head and the motor
Connect and be rotated by the motor, the detecting element electrically connects with the motor, for the power tool
Operating parameter values be acquired；The control device electrically connects with the motor and the detecting element respectively, for receiving
The operating parameter values of the detecting element feedback simultaneously judge whether the operating parameter values exceed default reference parameter value,
And when the operating parameter values of collection exceed the default reference parameter value, control the head that worked described in the motor driven
Stop operating or safe speed of rotation is down to by working speed and rotate.
In normal operating conditions, motor drives work head to rotate to above-mentioned power tool with certain working speed, with reality
Function corresponding to existing power tool.Wherein, rotated during motor normal work with working speed corresponding to default reference parameter value.
When the head that worked in power tool runs into barrier, human body or animal in the course of the work, the operating parameter values of power tool exist
It will be undergone mutation under the influence of work head, when control device judges that the operating parameter values of detecting element collection have exceeded default base
During quasi- parameter value, the work head that control device controlled motor drives is down to safe speed of rotation by working speed or makes work head stop turning
It is dynamic, prevent work head from continuing to touch human body, animal or barrier with faster work rotation, drive the debris such as stone, grass cuttings
Splash, human body or animal etc. is come to harm, fundamentally eliminate potential safety hazard, more comprehensively protect human body and animal.
In one of the embodiments, it is described when the operating parameter values are not less than the default reference parameter value
Control device, which is additionally operable to control, works head continuation with working speed rotation described in the motor driven.
In one of the embodiments, the detecting element is additionally operable to after the motor is down to the safe speed of rotation to institute
The operating parameter values for stating power tool are acquired, when the operating parameter values are not less than the default reference parameter value,
The control device is additionally operable to control the head that worked described in the motor driven to accelerate to the working speed by the safe speed of rotation；
When the operating parameter values exceed the default reference parameter value, the control device is additionally operable to control the motor driven
The work head continues to rotate with the safe speed of rotation.
In one of the embodiments, the control device is by adjusting current value or the magnitude of voltage control at the motor both ends
Make the rotating speed of the motor.
In one of the embodiments, the operating parameter values of the detecting element collection are presently described power tool
Torque value, current value or impact strength value.
In one of the embodiments, the control device includes first port, second port and the 3rd port, the inspection
The one end for surveying element is connected with the first port of the control device, the other end of the detecting element and the motor
Positive pole is connected, and the second port is connected with the negative pole of the motor, the detecting element also with the control device the 3rd
Port is connected, and the control device receives the operating parameter values of the detecting element feedback by the 3rd port.
In one of the embodiments, the power tool is grass-mowing machine, and the work head is on the grass-mowing machine
Moving head, when the moving head runs into barrier, human body or animal, the moving head of the motor driven stops operating
Or the safe speed of rotation is down to by the working speed and rotated.
In one of the embodiments, the moving head includes cutting blade, the cutting blade and the motor connection
And be rotated by the motor, the control device is used for when the operating parameter values are less than the reference parameter value
Control the cutting blade to stop operating or be down to the safe speed of rotation by the working speed to rotate.
A kind of control method of power tool, comprises the following steps：
The operating parameter values of power tool are acquired；
Receive the operating parameter values and judge whether the operating parameter values exceed default reference parameter value；
When the operating parameter values exceed the default reference parameter value, the head that worked described in the motor driven is controlled
Stop operating or safe speed of rotation is down to by working speed and rotate.
In one of the embodiments, after the rotating speed of the motor is down to the safe speed of rotation, the running parameter is received
It is worth and judges whether the operating parameter values exceed the default reference parameter value, if so, controls described in the motor driven
Work head is still worked on the safe speed of rotation；If it is not, the head that worked described in the motor driven is controlled by the safe speed of rotation
The working speed is accelerated to work on.
In one of the embodiments, the operating parameter values are torque value, current value or the collision of the power tool
Intensity level.
Brief description of the drawings
Fig. 1 is that the circuit of power tool in one embodiment of the invention forms structure chart；
Fig. 2 is the module map of control device shown in Fig. 1；
Fig. 3 is the circuit diagram of power tool shown in Fig. 1；
Fig. 4 is the flow chart of the control method of power tool in one embodiment of the invention.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more saturating
It is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
As shown in figure 1, the power tool in one embodiment of the invention, including work is first 10, motor 20, detecting element 30 and
Control device 40, work first 10 are connected with motor 20 and are rotated by motor 20, and detecting element 30 is electrically connected with motor 20
Connect, for being acquired to the operating parameter values of power tool 100；Control device 40 is electric with motor 20 and detecting element 30 respectively
Whether connection, the operating parameter values for receiving the operating parameter values of the feedback of detecting element 30 and judge collection are pre- more than motor 20
If reference parameter value, and when the operating parameter values of collection exceed default reference parameter value, controlled motor 20 drives work
First 10 are down to safe speed of rotation by working speed rotates or stops operating.
In normal operating conditions, motor 20 drives work first 10 to rotate to above-mentioned power tool with certain working speed,
To realize function corresponding to power tool.Wherein, turned during 20 normal work of motor with being worked corresponding to default reference parameter value
Speed rotates.When worked in power tool first 10 run into barrier, human body or animal in the course of the work when, power tool 100
Operating parameter values will undergo mutation under the influence of work first 10, when control device 40 judges that the work that detecting element 30 gathers is joined
When numerical value has exceeded default reference parameter value, the work first 10 that the controlled motor 20 of control device 40 drives is down to by working speed
Safe speed of rotation makes work first 10 stop operating, and prevents work first 10 from continuing to touch human body, animal with faster work rotation
Or barrier, drive the debris such as stone, grass cuttings to splash, human body or animal etc. is come to harm, it is hidden fundamentally to eliminate safety
Suffer from, more comprehensively protect human body and animal.In addition, slow down the rotating speed of work at present first 10 when work first 10 runs into barrier
Or work first 10 stops operating, and can prevent from producing larger frictional force between work first 10 and barrier, and then extend power work
The service life of tool.
Specifically, the power tool is grass-mowing machine, work first 10 for be arranged on grass-mowing machine and motor 20 driving under shape
Into the moving head of cutting planes.It is to be appreciated that in some other embodiment, power tool can be that electric drill, electric hammer etc. have
The instrument of other functions, work first 10 can be to be arranged at electric drill, be used for the drill bit or hammer of realizing corresponding function on electric hammer, herein
It is not construed as limiting.
Further, moving head includes beat the grass rope and/or cutting blade, if atwirl cutting blade and barrier,
Human body or animal contact, it is easy to damaged to human body or animal, higher requirement is proposed to the security performance of grass-mowing machine.
In this specific embodiment, work first 10 includes being arranged at the cutting blade being connected with motor 20 on grass-mowing machine, by detecting member
Part 30 detects the running parameter of grass-mowing machine, and when grass-mowing machine runs into barrier, human body or animal, it is timely by control device 40
Control cutting blade stops operating or is down to safe speed of rotation by working speed, more fully protects human body and animal.
In the course of the work, due to work first 10 run into barrier when by the current value for causing power tool, torque value, touch
Hit intensity level etc. to undergo mutation, therefore the operating parameter values of the power tool of the collection of detecting element 30 are the power tool course of work
In current value, torque value, tachometer value, acceleration magnitude and impact strength value etc..Wherein, the electric current and power tool of power tool
The moment of torsion or rotating speed of output are in certain relation, therefore detecting element 30 can directly be dynamic for detecting in this specific embodiment
The current sensor of power instrument electric current.It is to be appreciated that in some other embodiment, detecting element 30 also can be collision sensing
Device, when power tool runs into collision thing, crash sensor can detect power tool with colliding the impact strength value of thing, control
Device 40 drives work first 10 to stop operating or by working speed according to the size controlled motor 20 of the impact strength value received
Safe speed of rotation is down to, is not limited thereto.
As shown in Fig. 2 in one of the embodiments, control device 40 includes comparator 42 and controller 44, comparator
42 are used to receive the operating parameter values of the feedback of detecting element 30 and judge whether operating parameter values exceed default reference parameter value；
The relation that controller 44 is used between the operating parameter values fed back according to detecting element 30 and default reference parameter value controls electricity
The rotating speed of machine 20.
Specifically, comparator 42 is used to receive the operating parameter values of the feedback of detecting element 30 and whether judges operating parameter values
More than default reference parameter value, if so, showing that the work first 10 of power tool runs into obstacle in the course of the work, cause to move
The operating parameter values (current value, torque value and impact strength value) of power instrument are undergone mutation, and controller 44 is used for controlled motor 20
Work first 10 is driven to stop operating or be down to safe speed of rotation by working speed, to protect operating personnel；If it is not, controller 44 is used for
Controlled motor 20 drives work head to be worked on working speed.
Comparator 42 is additionally operable to that the operating parameter values of motor 20 are carried out adopting reception after motor 20 drops to safe speed of rotation, and
Judge whether the current operating parameter values of motor 20 exceed default reference parameter value；If so, show that work first 10 does not bypass
Barrier, controller 44 are used for controlled motor 20 and drive work first 10 still to be worked on safe speed of rotation；If it is not, show work
First 10 cut-through thing, the drive work first 10 of the controlled motor 20 of controller 44 accelerate to working speed by safe speed of rotation and continue work
Make.
Wherein, controller 44 passes through the current value at the both ends of regulation motor 20 or the rotating speed of magnitude of voltage controlled motor 20.
As shown in figure 3, in one of the embodiments, control device 40 includes first port 46, second port 47 and the
Three ports 48, one end of detecting element 30 are connected with the first port 46 of control device 40, the other end and the electricity of detecting element 30
The positive pole of machine 20 is connected, and second port 47 is connected with the negative pole of motor 20, threeth end of the detecting element 30 also with control device 40
Mouth 48 is connected, and control device 40 passes through the 3rd port 48 and receives the operating parameter values that detecting element 30 feeds back.
Further, the power tool also includes power supply 50 and main switch 60, and power supply 50 provides electric energy for power tool, main
The working condition of the control power tool of switch 60, in the present embodiment, the working condition of power tool can be divided into running status
And closed mode.
As shown in figure 4, a kind of control method of power tool, including step S10~S30：
Step S10, the operating parameter values of power tool are acquired；
Specifically, the power tool is grass-mowing machine, and work head is the moving head on grass-mowing machine, it is preferred that moving head
Including cutting blade, when cutting blade runs into barrier, the operating parameter values of power tool will undergo mutation, detecting element
The running parameter of 30 detection power tools, the operating parameter values of power tool can be torque value, current value, the rotating speed of power tool
Value, acceleration magnitude or impact strength value etc..
Step S20, receive operating parameter values and judge whether operating parameter values exceed default reference parameter value；
Specifically, the comparator 42 of control device 40 receives the operating parameter values for the power tool that detecting element 30 feeds back simultaneously
Judge whether operating parameter values exceed default reference parameter value.
Step S30, if so, controlled motor drives work head to stop operating or be down to safe speed of rotation by working speed；If it is not,
Into step S31；
Step S31, controlled motor are worked on working speed.
Specifically, if the operating parameter values of power tool exceed default reference parameter value, the controller of control device 40
44 controlled motors drive moving head to stop operating or be down to safe speed of rotation by working speed, to protect operating personnel.
In one of the embodiments, after the rotating speed of motor is down to safe speed of rotation in step S30, in addition to：
Step S301, receive operating parameter values and judge whether operating parameter values exceed default reference parameter value,
If so, perform step S311：Controlled motor drives work head still to be worked on safe speed of rotation；
If it is not, perform step S312：Controlled motor drives work head to accelerate to working speed by safe speed of rotation and worked on.
Specifically, after moving head runs into barrier and is down to safe speed of rotation by working speed, detecting element 30 is to power
The operating parameter values of instrument continue to gather, and the comparator 42 of control device 40 receives operating parameter values and judges running parameter
Whether value exceedes default reference parameter value, if the operating parameter values of collection show to beat still above default reference parameter value
The non-cut-through thing of toothed burclover, controller 44 need controlled motor and still drive moving head to rotate to protect operating personnel with safe speed of rotation；
If the operating parameter values of collection show moving head cut-through thing, controller 44 is controlled not less than default reference parameter value
Motor processed accelerates to working speed by safe speed of rotation and continues work of beating the grass.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (11)
- A kind of 1. power tool, it is characterised in that including work head, motor, control device and detecting element, the work head with The motor connection is simultaneously rotated by the motor, and the detecting element electrically connects with the motor, for described The operating parameter values of power tool are acquired；The control device electrically connects with the motor and the detecting element respectively, For receiving the operating parameter values of the detecting element feedback and judging whether the operating parameter values exceed default base Quasi- parameter value, and when the operating parameter values of collection exceed the default reference parameter value, control the motor driven The work head stops operating or is down to safe speed of rotation by working speed and rotates.
- 2. power tool according to claim 1, it is characterised in that when the operating parameter values are default not less than described During reference parameter value, the control device, which is additionally operable to control, works head continuation with the working speed turn described in the motor driven It is dynamic.
- 3. power tool according to claim 1, it is characterised in that the detecting element is additionally operable to be down in the motor The operating parameter values of the power tool are acquired after the safe speed of rotation, when the operating parameter values are pre- not less than described If reference parameter value when, the control device is additionally operable to control the head that worked described in the motor driven to be added by the safe speed of rotation Speed is to the working speed；When the operating parameter values exceed the default reference parameter value, the control device is also used Continue to rotate with the safe speed of rotation in controlling the head that works described in the motor driven.
- 4. power tool according to claim 1, it is characterised in that the control device is by adjusting the motor both ends Current value or magnitude of voltage control the rotating speed of the motor.
- 5. power tool according to claim 1, it is characterised in that the operating parameter values of the detecting element collection For the torque value of presently described power tool, current value or impact strength value.
- 6. power tool according to claim 1, it is characterised in that the control device includes first port, the second end Mouth and the 3rd port, one end of the detecting element are connected with the first port of the control device, the detecting element The other end be connected with the positive pole of the motor, the second port is connected with the negative pole of the motor, and the detecting element is also It is connected with the 3rd port of the control device, the control device receives the detecting element by the 3rd port and fed back The operating parameter values.
- 7. power tool according to claim 1, it is characterised in that the power tool is grass-mowing machine, the work head To be arranged on the grass-mowing machine and the moving head of cutting planes being formed under motor driving, when the moving head runs into barrier When hindering thing, human body or animal, the moving head of the motor driven stops operating or is down to the peace by the working speed Full rotational speed.
- 8. power tool according to claim 7, it is characterised in that the moving head includes cutting blade, the cutting Blade is rotated by with the motor connection and in the motor, and the control device is used for low in the operating parameter values Control the cutting blade to stop operating or be down to the safe speed of rotation by the working speed when reference parameter value to turn It is dynamic.
- 9. a kind of control method of power tool, it is characterised in that comprise the following steps：The operating parameter values of power tool are acquired；Receive the operating parameter values and judge whether the operating parameter values exceed default reference parameter value；When the operating parameter values exceed the default reference parameter value, the head stopping that being worked described in the motor driven is controlled Rotate or safe speed of rotation is down to by working speed and rotate.
- 10. the control method of power tool according to claim 9, it is characterised in that the rotating speed of the motor is down to institute After stating safe speed of rotation, receive the operating parameter values and judge whether the operating parameter values exceed the default basic parameter Value, if so, controlling the head that worked described in the motor driven still to be worked on the safe speed of rotation；If it is not, control the motor Drive the work head to accelerate to the working speed by the safe speed of rotation to work on.
- 11. the control method of power tool according to claim 9, it is characterised in that the operating parameter values are described Torque value, current value or the impact strength value of power tool.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016105368856 | 2016-07-08 | ||
| CN201610536885 | 2016-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107580877A true CN107580877A (en) | 2018-01-16 |
Family
ID=61046251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610550565.6A Pending CN107580877A (en) | 2016-07-08 | 2016-07-13 | Power tool and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510551A (en) * | 2018-12-28 | 2019-03-22 | 上海辛格林纳新时达电机有限公司 | The implementation method and device of essential safe type servo-system |
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|---|---|---|---|---|
| JPH0715990A (en) * | 1993-06-29 | 1995-01-17 | Mitsubishi Electric Corp | Controller of industrial robot |
| CN203597111U (en) * | 2013-12-06 | 2014-05-21 | 郑斯元 | Mower with scram protection device |
| CN105262408A (en) * | 2015-11-23 | 2016-01-20 | 珠海格力电器股份有限公司 | Motor control method and system |
| CN105301987A (en) * | 2014-05-28 | 2016-02-03 | 苏州宝时得电动工具有限公司 | Handheld electric-driven tool and control method thereof |
| CN206136691U (en) * | 2016-07-08 | 2017-05-03 | 苏州宝时得电动工具有限公司 | Power tool |
-
2016
- 2016-07-13 CN CN201610550565.6A patent/CN107580877A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715990A (en) * | 1993-06-29 | 1995-01-17 | Mitsubishi Electric Corp | Controller of industrial robot |
| CN203597111U (en) * | 2013-12-06 | 2014-05-21 | 郑斯元 | Mower with scram protection device |
| CN105301987A (en) * | 2014-05-28 | 2016-02-03 | 苏州宝时得电动工具有限公司 | Handheld electric-driven tool and control method thereof |
| CN105262408A (en) * | 2015-11-23 | 2016-01-20 | 珠海格力电器股份有限公司 | Motor control method and system |
| CN206136691U (en) * | 2016-07-08 | 2017-05-03 | 苏州宝时得电动工具有限公司 | Power tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109510551A (en) * | 2018-12-28 | 2019-03-22 | 上海辛格林纳新时达电机有限公司 | The implementation method and device of essential safe type servo-system |
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