CN101087123A - Electromotive tool - Google Patents
Electromotive tool Download PDFInfo
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- CN101087123A CN101087123A CNA2006100933428A CN200610093342A CN101087123A CN 101087123 A CN101087123 A CN 101087123A CN A2006100933428 A CNA2006100933428 A CN A2006100933428A CN 200610093342 A CN200610093342 A CN 200610093342A CN 101087123 A CN101087123 A CN 101087123A
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- electric tool
- motor
- control unit
- pressure control
- pressure sensor
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- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000005498 polishing Methods 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 244000137852 Petrea volubilis Species 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
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Abstract
A kind of electric tool includes working part (14), motor (2) which drives said working part (14), it characterized in that it also includes pressure control unit (9) which is electric connected with said motor (2), said pressure control unit (9) receives different counterforce (F1) from said working part (14) to control said motor (2) to output corresponding power, adopting pressure to realize real precise adjustment of output power of motor (2) induced by different loads and different counterforce (F1).
Description
Technical field
The present invention relates to a kind of electric tool, particularly, the present invention relates to a kind of control device of regulating electric tool motor power output.
Background technology
In the existing electric tool, conventional all is that the motor power output is constant, makes instrument when different loads is operated, and understands the difference owing to load torque, and causes the difference of motor speed.
In the electric tool that minority motor power output is adjustable, be for tool work at different states, for example, multi-functional hand-held electric tool is operated in hammer, brill or hammer drill respectively; The load difference of processing because of instrument is also arranged, and at this moment for example corresponding timber and the cement of boring, bore required drilling speed difference, regulates the rotating speed of brill in advance under corresponding unequally loaded situation earlier, uses tool work again; Certainly, above-mentioned conversion of operation state or the conversion of boring rotating speed are also had plenty of by reducing gear and realize, are not to realize by the power output of regulating motor.And above-mentioned workpiece different rotating speeds all is initiatively to regulate in advance.
In addition, in existing sander and the reciprocating saw, because function singleness does not need conversion of operation state, and is the difference of corresponding operating load, if the motor power output is non-adjustable, then, make when machine is in zero load that motor speed can be very high in order when working, to keep workpiece that suitable rotating speed is arranged, the high speed zero load of above-mentioned instrument can cause vibrations and noise all very big, operator's feel is very poor; And when instrument in when work, be subjected to the influence of load, rotating speed of motor can reduce, particularly when load greatly the time, the operating efficiency of instrument is affected.
Especially in sander, for polishing load fast, the operator can firmly push sander with its speed that speeds operations usually, at this moment, the influence that increased by moment of torsion is under the constant situation of the power output of sander motor, the corresponding reduction of rotating speed of motor, thus the sander operating efficiency influenced.
And, even if existing can the electric tool of speed governing in, also all be under the situation of having known load in advance, going initiatively changes the speed of workpiece by regulating reducing gear or motor power output, to satisfy requirements of one's work.In this case, instrument is not strong to the adaptive ability of load, if to the load judgment error, then also need re-adjustments.
Summary of the invention
The objective of the invention is to, provide a kind of at the strong electric tool of different loads adaptive ability.
Another object of the present invention is to, provide a kind of motor power output with load to the different reaction forces of instrument and self-regulating electric tool.
A further object of the present invention is, the sander that provides a kind of motor power output accurately to regulate in real time.
A kind of electric tool, comprise workpiece, drive the motor of described workpiece, also comprise the pressure control unit that electrically connects with described motor, described pressure control unit is accepted the reaction force of the different sizes of described workpiece, thereby controls described motor output corresponding output power.
Described pressure control unit comprises pressure sensor, the microprocessor that links to each other with described pressure sensor.
Described pressure control unit comprises pressure sensor, control circuit that links to each other with described pressure sensor and the power device that links to each other with described control circuit.
Described pressure sensor converts the reaction force of being accepted to the signal of telecommunication.
When the reaction force of described pressure sensor acceptance changed, the resistance value of described pressure sensor changed.
Described electric tool is a sander, and described sander comprises a grip part, and described pressure control unit is positioned at described grip part.
Described electric tool is an electric drill, and described electric drill comprises a grip part, and described pressure control unit is positioned at described grip part.
Described electric tool is a reciprocating saw, and described reciprocating saw comprises a secondary grip part, and described pressure control unit is positioned at described secondary grip part.
Because pressure control unit is by accepting the reaction force from the different sizes of workpiece, control the motor power output, and then change the moment of torsion that motor can overcome, keep the motor speed of electric tool to be in an OK range, can improve the electric tool operating efficiency, and the operator also can feel pleasant when operation; And, when the operator wants to quicken operation, the meeting of nature strengthens the pressure of pushing electric tool, and the part of this pressure acts on the pressure control unit, this also just causes being increased by the reaction force that workpiece is carried on the pressure control unit, make the pressure control unit resistance value change, pressure control unit and then control motor are adjusted power output along with the difference of load, reach the purpose of acceleration work, and the adjusting accuracy and the real-time of motor power output are improved all.
Description of drawings
Fig. 1 is the control principle figure of electric tool pressure control unit of the present invention.
Fig. 2 is the schematic diagram of the electric tool first embodiment sander of the present invention.
Fig. 3 is the schematic diagram of the electric tool second embodiment electric drill of the present invention.
Fig. 4 is the schematic diagram of electric tool the 3rd embodiment reciprocating saw of the present invention.
Wherein:
1 housing, 2 motors, 3 transmission mechanisms
4 polishing base plate, 5 chip outlets 6 are accommodated pocket
7 grip parts, 8 electric wires, 9 pressure control units
10 pressure sensors, 11 processing units, 12 power devices
13 sand paper, 14 workpieces, 15 secondary handles
16 secondary grip parts
Embodiment
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
Electric tool comprises many types, and for example sander, reciprocating saw, percussion drill, cutting machine etc. are example with several frequently seen instrument below, and creating conception of the present invention is described.
As shown in Figure 2, sander comprises housing 1, in housing 1, be provided with motor 2, polishing base plate 4 is positioned at housing 1 outside, be provided with transmission mechanism 3 between motor 2 and polishing base plate 4, transmission mechanism 3 couples together motor 2 and polishing base plate 4, the machine driving that transmission mechanism 3 is realized between motor 2 and the polishing base plate 4, transmission mechanism 3 can adopt traditional technology, repeats no more herein.Polishing base plate 4 can be installed sand paper 13 workpieces such as class such as frosted such as grade 14.Motor 2 is connected with power supply by electric wire 8, and power supply herein is an alternating current, can certainly adopt the form of DC power supply, directly with on-chip power in housing 1.Near also being provided with chip outlet 5 near the polishing base plate 4, this chip outlet 5 is used for the dust or the chip eliminating of will polish at sander, simultaneously, is provided with at this chip outlet 5 and accommodates pocket 6.The grip part 7 of sander is arranged on housing 1 top, is used for the operator and operates sander and carry out work, and 7 are provided with pressure control unit 9 in the grip part, and pressure control unit 9 links to each other with motor 2.
As shown in Figure 1, pressure control unit 9 comprises pressure sensor 10, processing unit 11 and power device 12, pressure sensor 10 is connected to processing unit 11, processing unit 11 links to each other with power device 12, power device 12 links to each other with power supply with motor 2 respectively, power supply herein is a DC power supply, and processing unit 11 herein is control circuits.The operator is for polishing load fast, naturally can apply certain pressure in sander grip part 7, and a part of directed force F 2 of this pressure acts on the pressure sensor 10, load produces corresponding equilibrant force to polishing base plate 4 thereupon, polishing base plate 4 passes to pressure sensor 10 with a part of reaction force F1 of this equilibrant force, pressure sensor 10 is responded to this directed force F 2 and reaction force F1, and the different resistance values of pressure sensor 10 to of converting.Directed force F 2 is that a pair of size is identical with reaction force F1, the power that direction is opposite.Processing such as control circuit changes the resistance value signal of pressure sensor 10 and amplifies, computing, thereby change the output of power device 12, variation along with power device 12 outputs, make power supply be added in the also corresponding change of magnitude of voltage at motor 2 two ends, and motor 2 two ends apply the difference of voltage, cause the different power output of motor 2 outputs, also just changed the rotating speed of motor 2.Processing unit 11 herein and power device 12 also can adopt microprocessor to replace, and realize that the variable quantity to pressure sensor 10 resistance values amplifies, calculation process and direct control motor 2 both end voltage.Power device 12 herein can be controllable silicon, MOSFET or large power triode etc., is used for distinguishing corresponding different power supply types.Control circuit herein can adopt conventional operational amplification circuit to realize.
The operation principle of above-mentioned sander is described below, and when just beginning to sander motor 2 energized, sander is in Light Condition, and at this moment, motor 2 power output initial set value are smaller, with control no-load speed.When sander is worked, be subjected to load effect, the operator tends to apply pressing force by grip part 7 in order to finish bruting process fast, makes a part of directed force F 2 be applied on the pressure sensor 10, causes load meeting load balance power on polishing base plate 4.At this moment, polishing base plate 4 is with a part of reaction force F1 pressure sensor 10 of this equilibrant force, and adaptably, this reaction force F1 is in order to balanced action power F2.And be carried in this directed force F 2 on the pressure sensor 10 and reaction force F1 in balance mutually, change the resistance value of pressure sensor 10, thereby caused the variation of motor 2 power outputs.
Like this, the power output of motor 2 is just along with polishing base plate 4 is applied to the size of the reaction force F1 on the pressure sensor 10 and corresponding change, the custom of the control method match operation person operation tool of this motor 2 power outputs, easy to adjust and accuracy and real-time that regulate are all relatively good.And regulate motor 2 power outputs by the feedback of load and 4 pairs of pressure control unit power 9 of polishing base plate, make the ability of sander self-adapting load be improved.
As long as firmly push sander more, load will correspondingly increase, and causes load that the equilibrant force of polishing base plate 4 is strengthened, and motor 2 suffered moments of torsion also can increase, and cause motor 2 rotating speeds to reduce; But because firmly when pushing sander, except housing 1 will consume the part of this power, the directed force F 2 that is applied on the pressure sensor 10 by grip part 7 also can be big more, also can strengthen and the reaction force F1 of 4 pairs of pressure sensors 10 of polishing base plate is corresponding, make pressure control unit 9 resistance values change, cause motor 2 power outputs to increase, like this, the rotating speed of motor 2 just is maintained in the certain limit, has improved the sander operating efficiency.
Herein, it is operations for convenience that pressure control unit 9 is arranged on sander grip part 7, pressure control unit 9 can certainly be arranged on other suitable position, to satisfy such as the consideration for aspects such as reduced volumes.
Certainly, pressure sensor 10 herein also can be other transducers that pressure signal converted to signals such as electric current, voltage, displacement.
As shown in Figure 3, electric drill comprises housing 1, there is motor 2 housing 1 inside, transmission mechanism 3 links to each other with motor 2, in housing 1 outside workpiece 14 is arranged, and transmission mechanism 3 couples together motor 2 and workpiece 14, at housing 1 rear portion a grip part 7 is arranged, grip part 7 is provided with pressure control unit 9, and pressure control unit 9 electrically connects with motor 2, is provided with secondary handle 15 in housing 1 front portion.When electric drill is worked, for example on cement or timber, hole, operator one holds grip part 7, another holds secondary handle 15, in order to finish the process of boring fast, the operator can firmly push electric drill naturally, and the position of pressure control unit 9 is arranged so that the operator can go directly to apply directed force F 2 on pressure control unit 9 with that hand of holding grip part 7, for example by thumb press on pressure control unit 9, be equivalent to electric drill is pressed in load.At this moment, 14 1 equilibrant force of workpiece are given in the load meeting, transmission by power, workpiece can be applied to, direction opposite reaction F1 identical with the F2 size on the pressure control unit 10, with balanced action power F2, this reaction force F1 is applied on the pressure control unit 9, makes pressure control unit 9 resistance values change, thereby improves the power output of motor 2.The raising of motor 2 power outputs make motor 2 rotating speeds to be maintained within a certain range, and the moment of torsion that overcomes has increased, and the operating efficiency of electric drill just is improved.The operation principle of pressure control unit 9 is with aforementioned identical.
As shown in Figure 4, reciprocating saw housing 1 rear portion is provided with grip part 7, is provided with secondary grip part 16 in housing 1 front portion, and pressure control unit 9 is arranged on the secondary grip part 16.Housing 1 inside is provided with motor 2, and motor 2 is connected by transmission mechanism 3 with the workpiece 14 of housing 1 outside.During operation, operator one holds grip part 7, and another holds secondary grip part 16.When workpiece 14 work, for the process of finishing the work fast, operator's custom is firmly pushed reciprocating saw, housing 1 will consume the part of this pressing force, and be applied on the pressure control unit 9 by another part directed force F 2 of secondary grip part 16 with this pressing force, correspondingly, the load meeting produces corresponding equilibrant force for workpiece 14, and workpiece 14 will transmit reaction force F1 to pressure control unit 9, thereby balance is applied to the directed force F 2 on the pressure control unit 9, and this reaction force F1 has changed the resistance value of pressure control unit, and then has changed the power output of motor.
Claims (11)
1. electric tool, comprise workpiece (14), drive the motor (2) of described workpiece (14), it is characterized in that, also comprise the pressure control unit (9) that electrically connects with described motor (2), described pressure control unit (9) is accepted the reaction force (F1) of the different sizes of described workpiece (14), thereby controls described motor (2) output corresponding output power.
2. electric tool as claimed in claim 1 is characterized in that: described pressure control unit (9) comprises pressure sensor (10), the microprocessor that links to each other with described pressure sensor (10).
3. electric tool as claimed in claim 1 is characterized in that: described pressure control unit (9) comprises pressure sensor (10), control circuit that links to each other with described pressure sensor (10) and the power device (12) that links to each other with described control circuit.
4. as claim 2 or 3 described electric tools, it is characterized in that: described pressure sensor (9) converts the different big or small reaction forces of being accepted (F1) from workpiece (14) to the signal of telecommunication.
5. electric tool as claimed in claim 4 is characterized in that: when the different big or small reaction forces (F1) from workpiece (14) of described pressure sensor (10) acceptance changed, the resistance value of described pressure sensor (10) changed.
6. electric tool as claimed in claim 1 is characterized in that: described electric tool is a sander.
7. electric tool as claimed in claim 6 is characterized in that: described sander comprises a grip part (7), and described pressure control unit (9) is positioned at described grip part (7).
8. electric tool as claimed in claim 1 is characterized in that: described electric tool is an electric drill.
9. electric tool as claimed in claim 8 is characterized in that: described electric drill comprises a grip part (7), and described pressure control unit (9) is positioned at described grip part (7).
10. electric tool as claimed in claim 1 is characterized in that: described electric tool is a reciprocating saw.
11. electric tool as claimed in claim 10 is characterized in that: described reciprocating saw comprises a secondary grip part (16), and described pressure control unit (9) is positioned at described secondary grip part (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100933428A CN101087123A (en) | 2006-06-09 | 2006-06-09 | Electromotive tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100933428A CN101087123A (en) | 2006-06-09 | 2006-06-09 | Electromotive tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101087123A true CN101087123A (en) | 2007-12-12 |
Family
ID=38937932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100933428A Pending CN101087123A (en) | 2006-06-09 | 2006-06-09 | Electromotive tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101087123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326790A (en) * | 2018-02-21 | 2018-07-27 | 单杰 | Electric tool |
| CN113162485A (en) * | 2021-04-12 | 2021-07-23 | 浙江博来工具有限公司 | Electric tool |
| CN114453351A (en) * | 2022-01-25 | 2022-05-10 | 广东银浩智能技术有限公司 | Intelligent control method and system for assisting pipeline robot in dredging |
-
2006
- 2006-06-09 CN CNA2006100933428A patent/CN101087123A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326790A (en) * | 2018-02-21 | 2018-07-27 | 单杰 | Electric tool |
| CN113162485A (en) * | 2021-04-12 | 2021-07-23 | 浙江博来工具有限公司 | Electric tool |
| CN114453351A (en) * | 2022-01-25 | 2022-05-10 | 广东银浩智能技术有限公司 | Intelligent control method and system for assisting pipeline robot in dredging |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20071212 |