CN106444433A - Power tool and control method for same - Google Patents
Power tool and control method for same Download PDFInfo
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- CN106444433A CN106444433A CN201510482843.4A CN201510482843A CN106444433A CN 106444433 A CN106444433 A CN 106444433A CN 201510482843 A CN201510482843 A CN 201510482843A CN 106444433 A CN106444433 A CN 106444433A
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- Prior art keywords
- power tool
- motor
- workpiece
- tool body
- power
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Sawing (AREA)
Abstract
The invention relates to a power tool which comprises a power tool body. The power tool body comprises a housing, a motor, an working head, a power supply, a detecting unit and a control unit. The motor is accommodated in the housing. The working head is driven by the motor and a power is output from the motor. The power supply supplies power to the motor. The detecting unit is used for determining whether the power tool body arrives at a preset position of a workpiece. The control unit is connected with the detecting unit and the motor. On the condition that the detecting unit detects a fact that the power tool body reaches the preset position of the workpiece, the motor is stopped so that the working head correspondingly stops power outputting to a position with the anticipated cutting length on the workpiece. Therefore, an operator does not require paying attention to the accurate position of a saw blade, thereby preventing excessive cutting. Furthermore automatic stopping is realized, thereby reducing operation difficulty of the user and realizing high convenience in use. Furthermore, compared with a mechanical backstop mode, the power tool has advantages of no requirement for individual arrangement of a blocking fitting, simple structure and low manufacture cost. The invention further provides a control method for the power tool.
Description
Technical field
The present invention relates to a kind of power tool and the control method for power tool.
Background technology
In recent years, the development built with domestic city, urban afforestation has formed larger industry, city
The city maintenance of greening just relies on garden instrument to realize.
Electric saw is one of conventional power tool, and generally, in cutting process, user cannot precise control cut
Cut length, be susceptible to the phenomenon cut.Therefore, occur in that on the market and measure and display cutting for real-time
The electric saw of the cutting parameters such as length, however it is still necessary to user notes position and the display cutting of saw blade the moment
The accessory of parameter, using inconvenience.For solving the above problems, have also appeared a kind of employing mechanical stop mode
Electric saw, for example, the patent application of Application No. 201280055535.8, it is configured with independent adnexa, using machine
Tool backstop mode pushes away before stopping machine, but this complex structure, inconvenience is fixing, and manufacturing cost is high.
Content of the invention
Based on this it is necessary to a kind of structure of offer is simple, can achieve automatic stop, and the power work of low cost of manufacture
Tool and the control method for power tool.
A kind of power tool, including power tool body, described power tool body includes：
Housing；
Motor, is contained in described housing；
Work head, drives output power by described motor；
Power supply, provides power for described motor；
Described power tool also includes：
Detector unit, for detecting whether described power tool body reaches the predeterminated position of workpiece；
Control unit, is connected with described detector unit and described motor respectively, when described detector unit detects
Described power tool body reaches the predeterminated position of described workpiece, controls described motor to be decelerated to shutdown, makes institute
State the corresponding output power that stops of work head in the position of the desired length of cut of described workpiece.
By detector unit, above-mentioned power tool can detect whether power tool body reaches the default position of workpiece
Put, when detector unit detects the predeterminated position that described power tool body reaches described workpiece, then control single
Unit controls described motor to be decelerated to shutdown, so that work head is corresponding and stopping output power and cut in workpiece is desired
Cut the position of length.So, operator need not note the accurate location of saw blade constantly, prevented from cutting, and real
Existing autostop, reduces the operation easier of user, easy-to-use.Additionally, comparing the side of mechanical stop
Formula, without being separately provided stop accessory, structure is simple, and low cost of manufacture.
Wherein in an embodiment, described detector unit includes sensor, and coordinates sense with described sensor
Described power tool body is answered to reach the identification element of the predeterminated position of workpiece, described sensor is arranged at described
Housing, described identification element is arranged at the described predeterminated position of workpiece；
Wherein, described control unit, according to the cooperation sensing of described sensor and described identification element, controls institute
State motor and be decelerated to shutdown.
Wherein in an embodiment, described control unit is additionally operable to controlling motor start process, when described inspection
Survey unit and described identification element is detected and do not trigger and sense described sensor, described control unit controls described horse
Reach start.
Wherein in an embodiment, described sensor is magnetoelectric transducer.
Wherein in an embodiment, described identification element is the ferrous metal such as ferrum, cobalt, nickel or its alloy.
Wherein in an embodiment, described identification element is configured to drawing pin shape or portable label-like.
Wherein in an embodiment, described control unit includes processor and drive control circuit, described process
Device, drive control circuit, motor and described power supply connect formation one conducting loop；
Described microprocessor is also connected with described detector unit, with the detection signal control based on described detector unit
Make closure or the disconnection of described drive control circuit, thus controlling described motor start or shutting down.
Wherein in an embodiment, when described detector unit detects described power tool body, to reach workpiece pre-
If position, described processor sends corresponding control signal, controls described drive control circuit to disconnect, and then
Control described motor shutdown.
A kind of control method for such as above-mentioned power tool, comprises the following steps：
Whether detection power tool body reaches the predeterminated position of workpiece；
If so, motor is controlled to be decelerated to shutdown.
Wherein in an embodiment, the predeterminated position whether described detection power tool body reaches workpiece includes
Following steps：
By identification element located at workpiece predeterminated position；
Whether detection identification element triggers inductive transducer, thus judging whether power tool body reaches workpiece
Predeterminated position.
Brief description
Fig. 1 is the operating diagram of the power tool of an embodiment；
Fig. 2 is the workflow schematic diagram of the power tool of an embodiment；
Fig. 3 is the circuit control principle figure of the power tool of an embodiment.
Specific embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.
The preferred embodiment of the present invention is given in accompanying drawing.But, the present invention can come in many different forms
Realize however it is not limited to embodiment described herein.On the contrary, provide the purpose of these embodiments be make right
The understanding of the disclosure is more thoroughly comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly in another yuan
On part or can also there is element placed in the middle.When an element is considered as " connection " another element, it can
To be directly to another element or to may be simultaneously present centering elements.Term as used herein " is hung down
Straight ", " level ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technology used herein and scientific terminology and the technology belonging to the present invention
The implication that the technical staff in field is generally understood that is identical.The art being used in the description of the invention herein
Language be intended merely to describe specific embodiment purpose it is not intended that in limit the present invention.Used herein
Term " and/or " include the arbitrary and all of combination of one or more related Listed Items.
As shown in Figures 1 and 3, the power tool 10 in present pre-ferred embodiments includes power tool body
(figure do not mark), this power tool body include housing 12, the motor 14 being contained in housing 12, by described
Motor 14 drives the work head (not shown) of output power, provides the power supply 16 of power for this motor 14, examines
Survey unit 18 and control unit 19.
Detector unit 18 can detect whether power tool body reaches the predeterminated position of workpiece, control unit 19
It is connected with this detector unit 18 and motor 14 respectively, arrive when detector unit 18 detects this power tool body
Reach the predeterminated position of this workpiece, control motor 14 to be decelerated to shutdown, so that the corresponding stopping output of this work head is dynamic
Power is in the position of the desired length of cut of workpiece.Because traditional electric saw is in cutting workpiece, workpiece is cut
Position factor blocked etc. by electric saw guard shield cause light not good, and operator cannot precise control expectation completely
Length of cut, it occur frequently that over-cutting, the middle power tool 10 of the present invention can by detector unit 18
Whether detection power tool body reaches the predeterminated position of workpiece, when detector unit 18 detects described power work
Tool body reaches the predeterminated position of described workpiece, then control unit 19 controls described motor 14 to be decelerated to shutdown,
So that the corresponding output power that stops of work head is in the position of the desired length of cut of workpiece.So, operator
The accurate location of saw blade need not constantly be noted, prevented from cutting, and realize autostop, and reduced user
Operation easier, easy-to-use.Additionally, comparing the mode of mechanical stop, without being separately provided stop accessory,
Structure is simple, and low cost of manufacture.
It should be noted that the predeterminated position in the present invention refers to, for meeting work pieces process demand, work as power
When instrument 10 reaches this predeterminated position, work head reaches in working angles according to pre-set dimension position to be cut
Put.
Specifically, as shown in figure 1, detector unit 18 is included sensor 182 and coordinated with sensor 182
For sensing the identification element 184 that power tool body reaches the predeterminated position of workpiece, in the present embodiment, this biography
Sensor 182 is arranged at housing 12, and this identification element 184 is arranged at the predeterminated position of workpiece；Wherein, this control
Unit 19 processed, according to the cooperation sensing of sensor 182 and identification element 184, controls motor 14 to be decelerated to and stops
Machine.Sensor 182 be noncontact class sensor 182, for example, magnetoelectric transducer 182, photoelectric sensor 182,
Inductance sensor 182 etc., is not limited thereto.Identification element 184 is different according to the type of sensor 182
And different, can be for example salient point, baffle plate or magnet steel etc..In the present embodiment, sensor 182 passes for magnetoelectricity
Sensor 182, identification element 184 is the ferrous metal such as ferrum, cobalt, nickel or its alloy, so as to cause magnetic field to become
Change or itself can produce magnetic field, magnetoelectric transducer 182 recognizes this identification element 184, then send detection
To control unit 19, control unit 19 controls motor 14 to shut down, thus realizing the purpose of automatic stop to signal.For
It is easy to identification element 184 and be arranged at the predeterminated position of workpiece it is preferable that identification element 184 can be fabricated to figure
Nail or similar portable tag, easy-to-use.
It may be noted that the position that sensor 182 is arranged at the housing 12 of power tool 10 is not construed as limiting, energy
In power tool 10 traveling process, identification element 184 can be accurately identified.For example, may also be disposed on
The guard shield of electric saw periphery, or on baffle plate.Because sensor is not directly arranged on work head, biography need to be measured
Sensor 182 and the distance foremost of work head and absorption surface, consequently facilitating lay identification element 184, example
As, in the present embodiment, sensor 182 is arranged on guard shield, sensor 182 away from electric saw and absorption surface
Front end distance be S1, when expectation length of cut is S2, then when sensor 182 is touched with identification element 184
When sending out sensing, the predeterminated position that identification element 184 sets is as S2-S1Position.Certainly, in some other reality
Apply in example, the installation position of identification element 184 can be drawn according to the actual setting position of sensor 182,
Thus accurately obtaining desired Cutting Length.
More specifically, control unit 19 is additionally operable in the process controlling motor start, when detector unit 18 is examined
Measure identification element 184 and do not trigger inductive transducer 182, then control unit 19 controls motor 14 to start shooting.Tool
Body in the such as embodiment of Fig. 2, the detection signal continuous sampling to detector unit 18 for the control unit 19, should
When identification element 184 does not trigger inductive transducer 182, control unit 19 sampled signal is state 0, this
When, control unit 19 controls motor 14 to start shooting, and motor 14 runs well, when identification element 184 triggers sense
Induction sensor 182, then control unit 19 sampled signal is state 1, and control unit 19 controls motor 14 to subtract
Speed is extremely shut down, thus realizing the function of automatic stop.
Refer to Fig. 3, in the present embodiment, this control unit 19 includes processor 192 and drive control circuit
194, this processor 192, drive control circuit 194, motor 14 and power supply 16 connect formation one and turn on back
Road.Microprocessor 192 is also connected with detector unit 18, with the detection signal control based on this detector unit 18
The closure of drive control circuit 194 processed or disconnection, thus control motor 14 to start shooting or shut down.It may be noted that
Processor 192 can adopt MCU, PLC or CPU etc., and in the present embodiment, processor 192 is micro- electricity
Brain control system (MCU), those skilled in the art are it is contemplated that MCU generally includes central authorities' process
Unit (CPU), read only memory (ROM), random access memory (RAM), digital/analog converter,
Timer, input/output end port etc., because the operation principle of these units or functional module is all this area
Those of ordinary skill is known well, therefore repeats no more its concrete structure and principle.This drive control circuit 194 is
Mos field effect transistor circuit (MOSFET, Metal-Oxide-Semiconductor
Field-Effect Transistor), when sensor 182 is labeled element 184 triggering sensing, then processor 192
Receive the detection signal of sensor 182 transmission, and send corresponding control signal, control drive control electricity
Road 194 disconnects, and then controls motor 14 to shut down.Preferably, between this sensor 182 and processor 192
It is additionally provided with signal processing circuit 196, the signal type of sensor 182 is converted into by this signal processing circuit 196
Corresponding to the signal type of processor 192, consequently facilitating processor 192 controls drive control circuit 194
Closure and disconnection.Also set between this processor 192 and power supply 16 (Volt Current Condenser, VCC)
There is low pressure difference linear voltage regulator 198 (Low Dropout Regulator, LDO), thus ensureing processor 192
Voltage stabilization.
The present invention passes through setting sensor 182 on housing 12, and is arranged at work by electronic marker technology
The identification element 184 of part predeterminated position, detects whether power tool body reaches predeterminated position, and controls horse
Reach 14 and be decelerated to shutdown, so that work head stops the position of the length of cut that output power obtains in this expectation,
And then realize automatic stop.Compare traditional mechanical stop mode, structure is simple, be easy to fixation, and manufacturing cost
Low, greatly reduce the operation easier of user.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not right
The all possible combination of each technical characteristic in above-described embodiment is all described, as long as however, these skills
There is not contradiction in the combination of art feature, be all considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed,
But can not therefore be construed as limiting the scope of the patent.It should be pointed out that for this area
For those of ordinary skill, without departing from the inventive concept of the premise, can also make and some deform and change
Enter, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended power
Profit requires to be defined.
Claims (10)
1. a kind of power tool, including power tool body, described power tool body includes：
Housing；
Motor, is contained in described housing；
Work head, drives output power by described motor；
Power supply, provides power for described motor；
It is characterized in that, described power tool also includes：
Detector unit, for detecting whether described power tool body reaches the predeterminated position of workpiece；
Control unit, is connected with described detector unit and described motor respectively, when described detector unit detects
Described power tool body reaches the predeterminated position of described workpiece, controls described motor to be decelerated to shutdown, makes institute
State the corresponding output power that stops of work head in the position of the desired length of cut of described workpiece.
2. power tool according to claim 1 is it is characterised in that described detector unit includes sensing
Device, and described work head reaches the identification element of the predeterminated position of workpiece with the cooperation sensing of described sensor,
Described sensor is arranged at described housing, and described identification element is arranged at the described predeterminated position of workpiece；
Wherein, described control unit, according to the cooperation sensing of described sensor and described identification element, controls institute
State motor and be decelerated to shutdown.
3. power tool according to claim 2 is it is characterised in that described control unit is additionally operable to
Control motor start process, do not trigger the described sensing of sensing when described detector unit detects described identification element
Device, described control unit controls described motor start.
4. power tool according to claim 2 is it is characterised in that described sensor is magnetic-electric sensing
Device.
5. power tool according to claim 4 it is characterised in that described identification element be ferrum, cobalt,
The ferrous metal such as nickel or its alloy.
6. power tool according to claim 2 is it is characterised in that described identification element is configured to
Drawing pin shape or portable label-like.
7. the power tool according to claim 1～6 any one is it is characterised in that described control list
Unit includes processor and drive control circuit, described processor, drive control circuit, motor and described power supply
Connect and form a conducting loop；
Described microprocessor is also connected with described detector unit, with the detection signal control based on described detector unit
Make closure or the disconnection of described drive control circuit, thus controlling described motor start or shutting down.
8. power tool according to claim 7 is it is characterised in that when described detector unit detects
Described power tool body reaches workpiece predeterminated position, and described processor sends corresponding control signal, controls
Described drive control circuit disconnects, and then controls described motor shutdown.
9. a kind of control method for such as claim 1～8 any one power tool it is characterised in that
Comprise the following steps：
Whether detection power tool body reaches the predeterminated position of workpiece；
If so, motor is controlled to be decelerated to shutdown.
10. the control method for power tool according to claim 9 is it is characterised in that described
The predeterminated position whether detection power tool body reaches workpiece comprises the following steps：
By identification element located at workpiece predeterminated position；
Whether detection identification element triggers inductive transducer, thus judging whether power tool body reaches workpiece
Predeterminated position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482843.4A CN106444433B (en) | 2015-08-07 | 2015-08-07 | Power tool and control method for power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482843.4A CN106444433B (en) | 2015-08-07 | 2015-08-07 | Power tool and control method for power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106444433A true CN106444433A (en) | 2017-02-22 |
| CN106444433B CN106444433B (en) | 2019-08-20 |
Family
ID=58092266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510482843.4A Active CN106444433B (en) | 2015-08-07 | 2015-08-07 | Power tool and control method for power tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483268A (en) * | 2018-12-31 | 2019-03-19 | 兴化东华齿轮有限公司 | The quick accurate positioning of drive shaft cutting and cutoff device and Cutting Process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0811466B1 (en) * | 1993-09-30 | 2002-09-11 | Black & Decker Inc. | Improvements in or relating to power tools |
| CN1874871A (en) * | 2003-11-11 | 2006-12-06 | 罗伯特·博世有限公司 | Hand-held machine tool |
| WO2010087351A1 (en) * | 2009-01-30 | 2010-08-05 | Hitachi Koki Co., Ltd. | Reciprocating electric tool |
| CN103068510A (en) * | 2010-08-11 | 2013-04-24 | 博世电动工具（中国）有限公司 | Circular saw with control accessory |
| CN103930247A (en) * | 2011-11-15 | 2014-07-16 | 罗伯特·博世有限公司 | Device for limiting the length of a cut |
-
2015
- 2015-08-07 CN CN201510482843.4A patent/CN106444433B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0811466B1 (en) * | 1993-09-30 | 2002-09-11 | Black & Decker Inc. | Improvements in or relating to power tools |
| CN1874871A (en) * | 2003-11-11 | 2006-12-06 | 罗伯特·博世有限公司 | Hand-held machine tool |
| WO2010087351A1 (en) * | 2009-01-30 | 2010-08-05 | Hitachi Koki Co., Ltd. | Reciprocating electric tool |
| CN103068510A (en) * | 2010-08-11 | 2013-04-24 | 博世电动工具（中国）有限公司 | Circular saw with control accessory |
| CN103930247A (en) * | 2011-11-15 | 2014-07-16 | 罗伯特·博世有限公司 | Device for limiting the length of a cut |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483268A (en) * | 2018-12-31 | 2019-03-19 | 兴化东华齿轮有限公司 | The quick accurate positioning of drive shaft cutting and cutoff device and Cutting Process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106444433B (en) | 2019-08-20 |
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