CN1418760A - Electronic driven tool - Google Patents
Electronic driven tool Download PDFInfo
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- CN1418760A CN1418760A CN02149937.3A CN02149937A CN1418760A CN 1418760 A CN1418760 A CN 1418760A CN 02149937 A CN02149937 A CN 02149937A CN 1418760 A CN1418760 A CN 1418760A
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- 230000003116 impacting effect Effects 0.000 claims description 33
- 230000008859 change Effects 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000008450 motivation Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 16
- 230000009471 action Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The provides a cordless electric tool promoting a fastening function or a cutting function by facilitating to control a rotational number of a motor from a low speed region to a high speed region, reducing generation of vibration or noise and achieving small-sized formation and light-weighted formation, there is provided a cordless electric tool constituted by a brushless direct current motor 3, an output shaft 5 connected to the brushless direct current motor 3 via a speed changing device 4, a motor driving circuit 7 and a control portion 8 of the driving circuit and using a charge type battery 11 as a drive power source.
Description
Technical field
The present invention relates to electric tool.
Background technology
Always, as the electric tool that in the operation such as fastening of the cutting of perforate etc. and screw and bolt, uses, generally all use the electric tool of portable electric drill and electric screw driver etc.This electric tool has rotary speed and the adjustment of rotating torques and the functions such as switching of direction of rotation of drive motor, and can change the instrument of front end.
Particularly in recent years, what have charged brush is the cordless power tool of the dc motor of power supply with the TunePower, and simple to operate, operation is superior, is also popularized in family uses.
Figure 7 shows that an example of wireless (cordless) electric tool in the past, it is the outside drawing that can be also used as the electric screw driver drill bit 200 of screwdriver and drill bit, and the overview of its internal structure (being shown in broken lines) now is described by this outside drawing.
Ropeless electric screwdriver drill bit 200 usefulness shown in the figure by as the motor 203 of drive source, hold the gear-box 204 of the gear mechanism that the rotating speed with motor 203 slows down and be connected to the drive part 215 that the output shaft 205 of gear-box 204 forms.Constitute with the operation part 216 of the switch 209 that has its control section 208 and control power supply by motor drive circuit 207 and the power unit 217 that TunePower 211 forms, and form electric screw driver drill bit 200 by shell 202.
In the above-mentioned electric screw driver drill bit 200 in the past,, used the dc motor of charged brush as the motor 203 of drive source.
The dc motor of charged brush is because rotation at a high speed, so restive speed, be difficult at rotating speed from low speed to regional continuous control electric screw driver drill bit 200 at a high speed, the employed range of speeds is divided into low regime and high velocity, the use of crossing over two speed district continuous stepless speed changes is restricted.
Also have, because the control of above-mentioned rotating speed is to control by the operation of switch, thus need the switch of high price, and because it is controlled poor, operation also degenerates.
Also have, because rotating to be at a high speed of motor so the necessary big retarding ratio that uses by gear thus, produces big noise and vibration, and owing to use relatively large gear-box, so the instrument change is heavy and become big, produces the problem of operation difference.
Have again, because brush when rotation produces spark, the image disruption of noise, wireless noise, television set occurs, owing to the slip of brush and commutator produces problems such as noise.Also have, the life-span of brush is short, need carry out the maintenance works such as maintenance, replacing of brush or motor.
Summary of the invention
Therefore, first purpose of the present invention is for providing a kind of wireless (cordless) electric tool, it carries out the rotating speed control from low regime to high velocity of drive motor easily, by selecting on a large scale rotating speed to improve cutting ability, fastening performance, and reduce noise and vibration, further can miniaturization, lightweight, long lifetime.
Below, Fig. 8 illustrates the structure in general of the operation part 301 of above-mentioned electric tool, and Fig. 9 is a line map, and it illustrates the electrical construction of lever switch circuit 304 of the operation part 301 of electric tool.
Below, control reference Fig. 8 and Fig. 9 make an explanation to the operation part 301 of electric tool.
Being configured to of the operation part 301 of electric tool, it comprises the operation part body 302 that contains battery, motor, electromotor control circuit etc. and is attached on the operation part body 302 and the action bars 303 of the finger manipulation by the operator.
The operation part 301 of electric tool has the lever switch circuit 304 of the pulse width modulating signal (hereinafter referred to as pwm signal) that output uses corresponding to the Motor Drive of the mode of operation of operating lever 303.In lever switch circuit 304, have swept resistance circuit 305.Swept resistance circuit 305 has resistance R 1 and slip terminal 306, and resistance R 1 then is located between supply voltage Vdd and the earthing potential.The reference voltage V th of the output of slip terminal 306 inputs to non-inverting input terminal of comparison circuit 307, then imports the triangular signal of regulation at inverting terminal of comparison circuit 307.
Below, the action of lever switch circuit 304 is made an explanation.
The displacement of the arrow A 1 of action bars 303 or arrow A 2 directions is measured by aforementioned swept resistance circuit 305.At this moment, if along arrow A 1 direction operating operation bar 303, then the rotating speed of motor increases, if along arrow A 2 direction operating operation bars 303, the rotating speed of motor is reduced.
Herein, corresponding to the displacement of the slip terminal 306 of the direction of displacement arrow A 3 of arrow A 1 direction of the direction of operating of action bars 303 or the corresponding slip terminal 306 of arrow A 2 directions or arrow A 4, export the reference voltage V th that its output degree increase or reduce from slip terminal 306, and input to comparison circuit 307 non-inverting input terminal.
Thus, corresponding to the operation towards the aforementioned arrows A1 direction or arrow A 2 directions of action bars 303, the tach signal S1 from the suitable controlled pwm signal of load of comparison circuit 307 output triangular signals becomes the output of lever switch circuit 304.This tach signal S1 can be for example by comprising the rotary driving motors such as phase inverter of the switching transistor that Motor Drive uses.
In the operation part 301 of this existing electric tool,,, use the low intermediate speed of maximum speed to carry out operation than the operation part 301 of electric tool according to job content in the occasion of carrying out actual job.In this occasion, the operator is with the state of the operating lever 303 of holding with a firm grip fully, but carries out operation with medium gripping state, if the activity duration is long, just produce because finger fatigue etc., thereby rotating speed becomes instability, and operator's problems such as fatigue increasing.
Therefore, second purpose of the present invention is for providing a kind of electric tool, and it can prevent from the operator is caused great fatigue.And can stably carry out operation.
Being characterized as of the electric tool that a first aspect of the present invention is put down in writing, it comprises: motor, the output shaft, the drive circuit of motor and the control section of aforementioned drive circuit that are connected by aforementioned electric motivation and gear-box etc., and with the cordless power tool of TunePower as driving power, and the aforementioned electric motivation is the dc motor of brushless.
Being characterized as of the electric tool of a second aspect of the present invention, it has the brushless DC motor of the power source of electric tool, be used to change first control member of the maximum speed of aforementioned brushless DC motor, in the maximum speed scope of the aforementioned brushless DC motor of setting by aforementioned first control member, be used to change the control device of the rotation status of second control member of rotation speed change of aforementioned brushless DC motor and the aforementioned brushless DC motor of control, aforementioned control device comprises the maximum speed signal output apparatus of output corresponding to the maximum speed signal of the displacement of aforementioned first control member, with be maximum horizontal with maximum speed signal from the output of aforementioned maximum speed signal output apparatus, the tach signal output device that output drives aforementioned brushless DC motor corresponding to the tach signal and the rotation of the displacement of aforementioned second operating means.
A third aspect of the present invention, the electric tool of the electric tool of being put down in writing for putting down in writing as the present invention the 1st or the 2nd aspect, it is electric screw driver, electric screw driver drill bit, electric impacting screwdriver or electric wrench.
In the electric tool aspect the present invention the 1st, since with brushless DC motor as drive source, so can be owing to the efficient height of motor, and suppress the electric power that is consumed very low, and, because the control range of rotating speed becomes wide, control revolution in low regime to high velocity easily from motor, so the range of choice of the verticity of electric tool broadens, and can obtain the verticity corresponding to purposes easily, do not need to be used to carry out the high price switch of rotating speed control.
Also have, by using brushless DC motor, long lifetime, the maintainability that has solved instrument improves, produces when rotating problems such as spark.
Have again, also can reduce the speed reducing ratio of slowing down with gear of motor speed, and do not have the slip sound of brush, can suppress the generation of noise and vibration, also have, small-sized owing to gear-box being made, so can accomplish the miniaturization and the lightweight of electric tool.
According to the electric tool of the 2nd aspect of the present invention, operate first control member, change and set the maximum speed of brushless DC motor.According to the operation of first control member, from comprising the maximum speed signal output apparatus output maximum speed signal of control device.Also have, must operate second control member, to change the rotating speed of brushless DC motor.
According to the operation of second operating means, the tach signal output device that comprises control device is a maximum horizontal with aforementioned maximum speed signal, and output drives the brushless DC motor rotation corresponding to the tach signal of the displacement of second operating means.
Therefore, if adopt first operating means, the speed setting that actual job is required is on the maximum speed of electric tool, then in the occasion of operating second operating means, in the maximum speed scope of the brushless DC motor of setting with first control member, change the rotating speed of brushless DC motor, and reach the occasion of maximum (top) speed, the necessary rotating speed of fabrication process operating second operating means the biglyyest.
Description of drawings
Fig. 1 is the outside drawing of the electric screw driver drill bit of first form of implementation.
Fig. 2 is the block diagram of motor drive circuit.
Fig. 3 is a circuit diagram, and it illustrates the electrical construction of the major part of electric impacting screwdriver.
Fig. 4 is a block diagram, and it illustrates the electrical construction of electric impacting screwdriver.
Fig. 5 is the perspective view of electric impacting screwdriver.
Fig. 6 is a circuit diagram, and it illustrates the electrical construction of the electric impacting screwdriver of second form of implementation of the present invention.
Fig. 7 is the outside drawing of the electric screw driver drill bit of original technology.
Fig. 8 illustrates the overview of structure of operation part of the electric tool of original technology.
Fig. 9 is a circuit diagram, and it illustrates the electrical construction of the lever switch circuit of operation part.
The specific embodiment
First embodiment
The internal structure of the form of implementation of the present invention that explanation dots according to the outside drawing of Ropeless electric screwdriver drill bit 1 shown in Figure 1 below.
The drive part 15 that Ropeless electric screwdriver drill bit 1 usefulness shown in the figure is formed by gear-box 4 that slows down as the brushless DC motor 3 of drive source, with the rotating speed of brushless DC motor 3 and the output shaft 5 that is connected to gear-box 4, with constitute with the operation part 16 of the switch 9 of control power supply and the power unit 17 that TunePower 11 forms by having motor drive circuit 7 and control section thereof 8, and form electric screw driver drill bit 1 by shell 2.
In aforementioned drive part 15, on the driving shaft of brushless DC motor 3, connect the gear-box 4 hold the gear mechanism that is used to reduce rotating speed, and connect output shaft 5 in the front portion of gear-box 4, and be provided for installing the anchor clamps 6 of front end tools such as cutter head and drill bit at the front end of output shaft 5.
The power unit 17 of this electric screw driver drill bit 1 for can freely adorning the TunePower 11 of the below that is located at handle 10 with getting, and in TunePower 11, have the device of on handle 10 bottoms, installing and removing of boxlike, and at electric terminal shared when electric screw driver drill bit 1 is supplied electric power and charging.
Shown in the block diagram of Fig. 2, aforementioned Motor Drive loop 7 is accepted from the supply of electric power of TunePower 11 and is driven brushless DC motor 3, and constitute by phase inverter 21, the logic circuit 22 of controlling this phase inverter 21 and speed detect circuit 24, this phase inverter is made of switching transistor, and this speed detect circuit is according to the signal detection direction of rotation of the position detecting element 23 that comes freely to be included in the Hall unit composition in the brushless DC motor 3.This logic circuit 22 is by carrying out FEEDBACK CONTROL from the speed command signal of control section 8 and tach signal from speed detect circuit 24, making brushless DC motor 3 rotations by indicated speed, and gear-box 4 delivered in its output.
Above-mentioned electric screw driver drill bit 1 is by the operation of switch 9, the electric power of battery 11 is delivered to drive part 15 through control section 8 and motor drive circuit 7, and the on/off and the rotating speed of control brushless DC motor 3, driving force is passed to output shaft 5 from gear-box 4, make the front end tool (not shown) rotation of the cutter head that is installed in front end and drill bit etc., thereby carry out perforate, the terminal operation of cutting such as cracked grade and screw, bolt.
This electric screw driver drill bit 1 adopts brushless DC motor 3 in as the motor of drive source.
The control range of the rotating speed of the motor of aforementioned brushless DC motor 3 itself is than the direct current drive machine width of charged brush of past, rotating speed control easily, can be continuously and infinitely use rotating speed from low regime to high velocity, uses when use when can be easily selecting rotate at a high speed according to the purposes of electric tool and low-speed high-torque rotation etc. improve the operation and the operability of electric tool significantly.
That is to say, because the adjusting of the degree of pulling out that can be by switch 9, but select low speed to rotation at a high speed by the FEEDBACK CONTROL continuous stepless ground of aforementioned electric motor drive circuit, can obtain desired rotating torques, so fastening etc. the purposes and the job content of the screw when perforate operation that can be according to rotate at a high speed the time and low-speed high-torque rotation, bolt, the selection width in rotating speed district is broadened, and can carry out, improve operation with infinitely variable speeds.And switch 9 can use the simpler switch than past, and can use cheap switch.
Also have, because the rotating speed of the motor of the charged brush of rotating ratio of motor is low, so can reduce speed reducing ratio with the rotating speed of gear mechanism, be reduced in the vibration and the noise that produce in the gear-box, also have, the slip sound that does not have brush and commutator, and the generation of the vibration of electric tool and noise also is suppressed than in the past.
And by reducing of aforementioned speed reducing ratio, gear mechanism is simplified, and can accomplish miniaturization, the lightweight of gear-box, can improve operation by the lightweight and the densification of electric tool.
Also have, in the motor of the charged brush in past maintenance of the replacing of needed brush or motor etc. become unnecessary, improved maintenanceability, prolong the life-span of electric tool, and eliminated the problems such as image disruption of the assorted single and television set of radio that the spark that produces when rotating owing to brush forms.
As the electric tool that adopts above-mentioned brushless motor, applicable to electric screw driver and electric screw driver drill bit, electric impacting screwdriver, electric wrench etc., can obtain cutting with the operation of fastening grade superior, small-sized, the light weight operability good and be the electric tool of low vibration, low noise.
Have again, in above-mentioned various electric tools, produce vibration and the vibration of hitting and produce function and produce function with hitting by in the drill bit of front end tool and screwdriver, having, so can be used in electric impacting screwdriver, vibration brill, the electronic wood chipping equipment.
Also have,, can use above-mentioned brushless DC motor and be applicable to the instrument of step speed change formula according to the purposes of electric tool.
Also have, in above-mentioned form of implementation, though be described according to the electric tool that adopts dress modus ponens TunePower as power supply, but also go for the electric tool of following battery fixed form, the electric tool of this battery fixed form is provided with TunePower in the body of electric tool, and as ensconcing in the power unit during for example the following side of handle grades.
As TunePower, though nickel-cadmium cell and Ni-MH battery are shown as an example, so long as TunePower does not limit.
Have again, remove beyond the gun type shown in the figure, also can use for example bar-shaped pencil-type with in the flexible folding pattern of mid portion.
Also have, in above-mentioned form of implementation, though according to hand electric screwdriver drill bit explanation the present invention, but, electric tool of the present invention is removed beyond above-mentioned electric screw driver, electric impacting screwdriver, the electric wrench, also can be used in cutting knife class, plant scissors and the electric tools such as grinder such as sanding machine and polishing machine such as electric drill, electric planer, electric saw, screw thread cutting knife and hanging cutter, even and in desk type electric tools such as drilling machine, also can use certainly.
Second form of implementation
Make the following instructions according to Fig. 3～5 pair second form of implementation of the present invention.
Fig. 3 is a circuit diagram, and it illustrates the electrical construction of major part of the wireless type electric impacting screwdriver 111 of this form of implementation, and Fig. 4 is a block diagram, and it illustrates the electrical construction of electric impacting screwdriver 111, and Fig. 5 is the perspective view of electric impacting screwdriver 111.
In the form of implementation below, the wireless type electric impacting screwdriver 111 though exemplify, but the present invention is not limited thereto example, and to be connected to what use on the power supply be not electric impacting screwdriver or other electric tool of wireless type but can generally extensively be implemented as.(1) structure of electric impacting screwdriver 111
Below with reference to Fig. 5 the structure of electric impacting screwdriver 111 is made an explanation.
Electric impacting screwdriver 111 has body 112, be contained in instrument 113 on the end of body 112, at the integrally formed grip portions 114 of the other end of body 112.
In body 112, built-in brushless DC motor 123.
Grip portions 114 is made the form that the operator can be dominated by hand, and in the place that gripping state is placed finger, the rotating speed of configuration trigger-like switches lever (below be called the speed lever) 115.Also have,, TunePower 120 is set in the bottom of grip portions 114.This battery 120 is positioned in the charger 120a that is connected on the power supply that exchanges 100V and goes up and charging.
Near speed lever 115, locking switch 116 is set, the state of its fixed strain speed lever 115.
Near the grip portions 114 of body 112, configuration change-over switch 117, thus it switches the rotation of the rotation diverter tool 113 of brushless DC motor 123 between given forward and reverse.Also have,,, be provided for the maximum speed configuration switch (below be called configuration switch) 119 of the maximum speed of setting means 13 as an example at the top of body 112.(2) electrical construction of electric impacting screwdriver 111
Together referring to Fig. 4, the electrical construction of electric impacting screwdriver 111 is made an explanation below.
Electric impacting screwdriver 111 has speed controlling portion by battery 120 supply powers and divides 121 and controller 122 and brushless DC motor 123.
As described later, speed controlling portion divides the operation of 121 detection speed levers 115 and configuration switch 119, and to the tach signal S1 that be used to drive brushless DC motor that be subjected to PWM (pulse width modulation) of controller 122 outputs corresponding to the mode of operation of these levers 115 and configuration switch 119.Controller 122 comprises a plurality of switching transistor (not shown)s that are driven to connection/cut-out according to the tach signal S1 that divides 121 from speed controlling portion, and drives the driving signal of brushless DC motor 123 from these switching transistor outputs.
Speed controlling portion divides the rotating speed that 121 maximum speeds that have the operation that detects configuration switch 119 are switched the operation of lever switch circuit 24, detection speed lever 115 to switch lever switch 125.Control device comprises this speed controlling portion and divides 121 ground to constitute.(3) speed controlling portion divides 121 electrical construction
Below together with reference to figure 3, speed controlling portion divided an example of 121 electrical construction make an explanation.
Maximum speed is switched lever switch circuit 124 and is had the slip terminal 126 that the resistance R 11 that is connected in series between supply voltage Vdd and earthing potential and R12, relative resistance R11 slide.The output of slip terminal 126 is switched 125 outputs of lever switch circuit to rotating speed.
Rotating speed switches lever switch circuit 125 and has the resistance R 13 of input from the output of slip terminal 126, and the other end of resistance 13 is ground connection then.
Slip terminal 127 is set in resistance R 13, and the reference voltage V th that exports from slip terminal 127 inputs to non-inverting input terminal of comparison circuit 128, the triangular signal of then input regulation in inverting terminal of comparison circuit 128.Aforementioned tach signal S1 is then from comparison circuit 128 outputs.(4) action of electric impacting screwdriver 111
Below the action of electric impacting screwdriver 111 is made an explanation.
At first, operate aforementioned configuration switch 119, and set the maximum speed of electric impacting screwdriver 111 corresponding to job content.In this form of implementation, maximum speed is by stepless setting.That is to say, corresponding to the operation of configuration switch 119, infinitely mobile terminal 116, and output is corresponding to the maximum speed voltage Vs of the operating position that is parked in given locational configuration switch 119.
Secondly, when carrying out actual terminal operation, operator's service speed lever 115.Be actually and control grip portions shown in Figure 5 114.Hold speed lever 115 with finger.In this form of implementation,, move aforementioned slip terminal 127 along the direction of arrow B 1 or the direction of arrow B 2 corresponding to the size of the degree of holding speed lever 115.Corresponding to the direction and the degree of this displacement, increase and decrease is from the aforementioned reference voltage V th of slip terminal 127.The maximum of reference voltage V th is aforementioned maximum speed voltage Vs.
That is to say that maximum speed voltage Vs, and will be inputed to through the reference voltage V th that dividing potential drop obtains in non-inverting input terminal of comparison circuit 128 by dividing potential drop by resistance R 13 and slip terminal 127.When reference voltage V th is higher, be subjected to the tach signal S1 of high PWM (pulse width modulation) modulation from comparison circuit 128 output loadings.As previously mentioned, tach signal S1 is output to controller 122 and drives brushless DC motor 123 rotations.
Do like this, according to this form of implementation, if operation according to configuration switch 119, set the maximum speed of electric impacting screwdriver 111, even then reach the occasion of maximum speed at service speed lever 115 and by speed lever 115, its maximum speed also can become the maximum speed of setting with configuration switch 15.Thus, if operating and setting switch 119 is set needed rotating speed in the actual job, then can grip the state that limits service speed lever 115 and carry out operation by maximum.
Thus, owing to obtained the needed rotating speed of actual job, so do not need to reduce operator's fatigue widely by carrying out operation with the state of the aforementioned speed lever 115 of medium gripping than the low intermediate speed of maximum speed.Also have, can eliminate, can carry out stable operation because the operator carries out rotary speed unstabilization that operation produces calmly by the state of medium gripping speed lever 115.
The 3rd form of implementation
Fig. 6 is a circuit diagram, and it illustrates the electrical construction of the electric impacting screwdriver 111a of the 3rd form of implementation of the present invention.
This form of implementation is similar with second form of implementation, gives same reference numeral in the part of correspondence, and the explanation of repetition is saved.
Being characterized as of this form of implementation pressed multistage setting with the maximum speed of electric impacting screwdriver 111a.Below, the electrical construction of electric impacting screwdriver 111a is made an explanation.In this example, have structure equally with reference to the Fig. 4 in second example and Fig. 5 explanation.(1) speed controlling portion divides the electrical construction of 121a
Together referring to Fig. 6, divide an example of the electrical construction of 121a to make an explanation below to the speed controlling portion that in the electric impacting screwdriver 111a of this form of implementation, is equipped with.
Maximum speed is switched lever switch circuit 124a and is connected in parallel between supply voltage Vdd and the earthing potential respectively, and has mutual different a plurality of resistance R 14, the R15 of resistance value as an example ... with change-over switch 129.Resistance R 13 outputs that the reference voltage V th of the output of change-over switch 129 switches lever switch circuit 125 to rotating speed, this circuit 125 has the structure identical construction with first embodiment.(2) action of electric impacting screwdriver 111a
Below, the action of the electric impacting screwdriver 111a of this form of implementation is made an explanation.At first, operate aforementioned configuration switch 119, and set the maximum speed of electric impacting screwdriver 111a corresponding to job content.
That is to say,, change-over switch 129 is connected supply voltage Vdd, resistance R 14, resistance R 15 corresponding to the operation of configuration switch 119 ... in any one on.In the occasion that is connected on the supply voltage Vdd, become the maximum speed of electric impacting screwdriver 111a.
The action of rotating speed switching lever switch circuit 125 after this is identical with aforementioned form of implementation, and therefore, the action of electric impacting screwdriver 111a is also identical.
Therefore, in this form of implementation, realize effect and the effect identical with effect with the effect that in aforementioned first form of implementation, illustrates.
The electric tool of the present invention the 1st aspect is owing to be to adopt the cordless power tool of TunePower as the driving power of motor, and the aforementioned electric motivation is a brushless DC motor, so can in wide region, select the rotating speed and the rotating torques of electric tool and press the infinitely variable speeds use, and the generation of noise and vibration also reduces, can make every effort to miniaturization and lightweight, obtain the cordless power tool that high performance, operability are good, can improve operating environment, and the durable years of electric tool can increase also.
The electric tool of the present invention the 2nd aspect is operated first control member and is set the maximum speed of brushless DC motor, in the maximum speed scope that sets, operates second control member and changes the rotating speed of brushless DC motor.Thus,,, then become the occasion of maximum (top) speed operating second operating means the biglyyest, just become the necessary rotating speed of operation the maximum speed of the necessary speed setting of operation at electric tool if adopt first operating means.
Therefore, can change maximum speed, and operate second operating means the biglyyest and carry out operation corresponding to the job content that uses electric tool.Thus, can make the operator keep second operating means by the mode of operation of centre on the one hand, continue operation on the one hand, prevent to make the operator to be subjected to tired greatly accident, and can stably carry out operation.
Also have, fastening force is constant, and in the occasion of using trip bolt, fastening torque is even, stay in grade.
Claims (3)
1. electric tool is characterized by:
Comprise: motor, the output shaft, the drive circuit of motor and the control section composition of aforementioned drive circuit that are connected by aforementioned electric motivation and gear-box etc.,
It is to be used for the cordless power tool of TunePower as driving power,
The aforementioned electric motivation is a brushless DC motor.
2. an electric tool is characterized by, and has:
As the brushless DC motor of the power source of electric tool,
Be used to change the maximum speed of aforementioned brushless DC motor first control member,
In the maximum speed scope of the aforementioned brushless DC motor of setting by aforementioned first control member, be used to change aforementioned brushless DC motor rotating speed second control member and
Control the control device of the rotation status of aforementioned brushless DC motor,
Aforementioned control device comprises:
Corresponding to the maximum speed signal output apparatus of the displacement of aforementioned first control member output maximum speed signal and
With the maximum speed signal from aforementioned maximum speed signal output apparatus output is maximum horizontal, and output is corresponding to the tach signal of the displacement of aforementioned second operating means and the tach signal output device of the aforementioned brushless DC motor of rotation driving.
3. electric tool as claimed in claim 1 or 2 is characterized by, and aforementioned electric tool is electric screw driver, electric screw driver drill bit, electric impacting screwdriver or electric wrench.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP346652/2001 | 2001-11-12 | ||
| JP2001346652A JP2003145447A (en) | 2001-11-12 | 2001-11-12 | Electrically-driven tool |
| JP2002009132A JP2003211371A (en) | 2002-01-17 | 2002-01-17 | Power tool |
| JP009132/2002 | 2002-01-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1418760A true CN1418760A (en) | 2003-05-21 |
| CN1270875C CN1270875C (en) | 2006-08-23 |
Family
ID=26624489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02149937.3A Expired - Fee Related CN1270875C (en) | 2001-11-12 | 2002-11-08 | Electronic driven tool |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20030089511A1 (en) |
| CN (1) | CN1270875C (en) |
| DE (1) | DE10228129A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100537151C (en) * | 2004-07-23 | 2009-09-09 | 户津胜行 | Rotary tool driven by brushless motor |
| US7697826B2 (en) | 2004-06-05 | 2010-04-13 | Robert Bosch Gmbh | Hand-guided or stationary power tool having a drive unit |
| CN102138267A (en) * | 2008-05-28 | 2011-07-27 | 迪美科技控股有限公司 | An accessory and charging system for a rechargeable hand-held electrical device |
| CN103008723A (en) * | 2012-11-22 | 2013-04-03 | 浙江明磊工具实业有限公司 | Cordless electric drill |
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- 2002-11-08 CN CN02149937.3A patent/CN1270875C/en not_active Expired - Fee Related
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| CN112775884B (en) * | 2021-02-01 | 2023-08-25 | 广东米客科技有限公司 | Pistol type electric screw driver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1270875C (en) | 2006-08-23 |
| US20030089511A1 (en) | 2003-05-15 |
| DE10228129A1 (en) | 2003-05-22 |
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