CN102639301B - Percussion tool - Google Patents
Percussion tool Download PDFInfo
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- CN102639301B CN102639301B CN201080033580.4A CN201080033580A CN102639301B CN 102639301 B CN102639301 B CN 102639301B CN 201080033580 A CN201080033580 A CN 201080033580A CN 102639301 B CN102639301 B CN 102639301B
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- motor
- anvil
- percussion hammer
- tool
- electric current
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Abstract
According to an aspect of the present invention, it is provided that a kind of percussion tool (1), this percussion tool (1) including: the motor (3) that can drive under intermittent driving pattern；It is connected to the percussion hammer (41) of this motor；Clashed into by this percussion hammer (41) thus rotate/clash into the anvil (16) of tip end tool；And control unit, this control unit is by being supplied to the driving pulse of motor (3) to control the rotation of motor (3) according to the load switching being applied on tip end tool.
Description
Technical field
An aspect of of the present present invention relates to a kind of percussion tool by motor-driven and realizes one
Plant novel knocking gear.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and drives
The electronic pulse driver of power.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Another aspect of the present invention relates to a kind of power tool, is specifically related to a kind of output and rotates
The electronic pulse driver of driving force.
Background technology
In percussion tool, rotating percussion mechanism by as drive source motor-driven, with
There is provided to anvil and rotate and clash into, thus off and on rotating percussion power is delivered to tip end tool
To perform such as to tighten the operation of screw etc.Brushless DC motor is widely used as electricity
Motivation.Brushless DC motor is that such as DC without brush (for the brush of rectification) is (straight
Stream) motor.Coil (winding) is arranged in stator side, and magnet (permanent magnet) is arranged
On the rotor side, and rotor is applied sequentially at the electric power driven by inverter circuit
Rotate during predetermined coil.Inverter circuit utilizes FET (field-effect transistor) and such as IGBT
The high power capacity output transistor of (igbt) etc is constituted, and by big electricity
Stream drives.Brushless DC motor has excellent torque characteristics compared with having brush DC motor,
And with higher power, screw, bolt etc. can be fastened to base component.
JP-2009-072888-A discloses a kind of percussion tool using brushless DC motor.
In JP-2009-072888-A, this percussion tool has continuous rotary beater mechanism.When
When moment of torsion is supplied to mandrel via Poewr transmission mechanism (reducing gear), movably
The percussion hammer engaged along the rotary shaft direction of mandrel rotates, and makes the anvil rotation being resisted against on percussion hammer
Turn.Percussion hammer and anvil have the two of two positions that are mutually symmetrical being arranged on Plane of rotation
Individual percussion hammer lobe (shock portion), these boss are nibbled along direction of rotation each other in gear
The position closed, and rotating percussion power is by the engagement transmission between lobe.Percussion hammer can
Slide axially relative to mandrel in the annular region surrounding mandrel, and the inner peripheral surface of percussion hammer
Including inverted V-shaped (general triangular) cam groove.V-arrangement cam groove is axially disposed within the heart
On the outer peripheral face of axle, and percussion hammer is via the inner circumferential cam groove inserting cam groove and percussion hammer
Between ball (steel ball) rotate.
In transmission mechanism powered by conventional energy, mandrel and percussion hammer are via being arranged in cam groove
Ball is kept, and percussion hammer is constructed to be permeable to by being arranged in the spring of its rear end and relative
Retreat axially backward in mandrel.Therefore, the number of components of mandrel and percussion hammer increases, it is desirable to mandrel
And the height between percussion hammer attaches precision, thus adds manufacturing cost.
Meanwhile, in the percussion tool of routine techniques, in order to perform control to not operate punching
Hit instrument (that is, in order to not clash into), for example, it is desired to after controlling percussion hammer
Move back the mechanism of operation.The percussion tool of JP-2009-072888-A is consequently not used for so-called brill
Under progressive die formula.Even if additionally, achieving drill mode (even if controlling the retrogressing behaviour of percussion hammer
Make), in order to also realize interrupting the clutch behaviour of power transmission when reaching given tightening torque
Make, it is also desirable to be separately provided clutch mechanism, and in percussion tool, realize drill mode
Cost is caused to increase with the drill mode of band clutch.
Additionally, in JP-2009-072888-A, the driving electric being supplied to motor is permanent
Fixed, and unrelated with tip end tool load condition during being clashed into by percussion hammer.Therefore,
Even if also using high tightening torque to perform shock under light-load state.Therefore, excessive
Electric power is supplied to motor, and inoperative power consumption occurs.And, occur so-called
Departing from (coming-out) phenomenon, wherein screw is using high tightening torque to perform the spiral shell clashed into
Period excessively reach tightened by nail, and tip end tool separates with head of screw.
Conventional power tool mainly has motor, is rotated the percussion hammer driven by this motor
And anvil, moment of torsion be applied to by the collision with percussion hammer this anvil (for example, with reference to
JP-2008-307664-A).When the moment of torsion being delivered to anvil is applied to tip end tool, perform spiral shell
Nail or the terminal operation of like.In this power tool, when connecing of being arranged on percussion hammer
When the engaged projection closing projection and be arranged on anvil collides each other, moment of torsion is applied to anvil,
And moment of torsion is delivered to tip end tool.
But, in conventional power tool, copulational protuberance is raised by motor in speed
State under collide.Due to this reason, problem arises in that copulational protuberance and connect
Close the collision impact between projection and become big and tightening torque increase.Particularly to having fastened
Screw or like again fasten with strengthen fastening time, owing to tightening torque has applied
To screw, so moment of torsion is likely to be due to the collision impact between copulational protuberance and engaged projection
And become excessive.Therefore, it is an object of the invention to provide one to be prevented to exceed target
The moment of torsion of moment of torsion is supplied to the power tool of securing member.
In conventional power tool, there is a kind of power tool, wherein when reaching predetermined electricity
Judge during flow valuve to have obtained preset torque, and be automatically stopped to motor.Although it is this
Product has been sold, but except when stopping beyond motor when reaching preset torque,
Such as, when pulling power line in the case of using power line, or when using charging
In the case of battery, the dump energy of rechargeable battery also stops to motor when reducing.By
In this reason, when reaching preset torque, need to make workman be readily apparent that this event.
But, in conventional power tool, unless workman is by his/her finger slave flipflop
Taking away, otherwise operation will proceed.Therefore, there is inoperative power consumption, and electronic
The temperature of machine also rises.Especially with normal operating (motor rotates the most continuously)
Comparing, the rotating forward of motor and stopping at repeats under ratcheting operation pattern.Therefore, battery
Power consumption and intensification are substantially.Therefore, it is an object of the present invention to provide one can be
Reach to be readily apparent that during preset torque the power tool of this event.Another object of the present invention
It is to provide one to be difficult to when being readily apparent that this event ineffectually consume electric power and obtain height
The power tool of precision moment of torsion.
Workman can make screw or like be fitted to each other with the tip end tool of power tool,
And depression of trigger, thus perform the terminal operation of securing member.When bolt is fastened to by workman
When being formed with the pending operation part of lead-in wire (lead), owing to resistance is little, thus electric
Flow valuve is converted to low value, and the moment put in place at bolt, and current value flies up and stands
Quarter exceedes threshold value.
In this case, even if stopping motor by trigger being screwed to OFF shelves, stop
Only operation also due to the inertia of motor and postpone, and bolt is to equal or exceed required torsion
The value of square value is fastened.Therefore, it is an object of the invention to provide one and accurate mesh can be provided
The power tool of mark moment of torsion.
In the power tool of a kind of routine, it is known that the percussion hammer rotated along assigned direction is given along this
Determine direction and clash into the structure (for example, with reference to JP-2008-307664-A) of anvil.
But, in the power tool of this routine, if when starting in screw and top work
Depression of trigger under the best state is coordinated, coordinating between screw with tip end tool between tool
(disengaging) may be discharged, and may damage head of screw.Therefore, it is an object of the invention to
There is provided a kind of and be prevented from the power tool that tip end tool departs from from securing member.
In the power tool of a kind of routine, in the feelings of the temperature of the inner matter not considering housing
Motor (for example, with reference to JP-2010-058186-A) is controlled under condition.
In the power tool of this routine, in the situation of the heating of the inner matter not considering housing
Lower driving motor.Due to this reason, such as, if ambient temperature is low, then there is gear
The situation that hardening and motor the current value of the oils and fats viscosity-modifying of mechanism, oils and fats rises.
Due to this reason, it is low for needing according to ambient temperature or high change is supplied to motor
Electric power.
If it addition, ambient temperature is high, then for the switch unit of the coil power supply of motor
Part is likely to be due to switch element heating and damages.Due to this reason, need to prevent switch element
Temperature become too high.It is an object of the invention to provide a kind of applicable inner matter according to housing
Temperature change the power tool of control method of motor.
In the power tool of a kind of routine, it is known that the percussion hammer rotated along assigned direction is given along this
Determine direction and clash into the structure (for example, with reference to JP-2008-307664-A) of anvil.
Meanwhile, applicant of the present invention's one newly developed is configured to make percussion hammer rotate and reverse
Thus clash into the electronic pulse driver of anvil.But, drive in this electronic impulse newly developed
In device, coordinating between screw or like with tip end tool may discharge (disengaging),
And may damage head of screw.Additionally, the retroaction that the operation after putting in place causes is at power
Instrument produces the power on direction opposite to the direction of rotation, and makes workman not feel well.
Therefore, it is an object of the invention to provide a kind of can reduction from the retroaction treating operation part
The power tool of power.
The power tool of a kind of routine fits through output shaft and carrys out turn Fastener.Even if using
Multiple securing members, the control of motor is the most identical (for example, with reference to JP-2008-307664-A).
But, the securing member that this instrument powered by conventional energy is difficult to according to being used performs fastening.
Particularly when performing the terminal operation of wood screw, wood screw is even also required to afterwards putting in place
Perform fastening, and need to provide to tip end tool the control of high torque.Additionally, when performing
During the terminal operation of bolt, can not perform further to fasten after putting in place.Therefore, when
When the rotating forward time of pulse is long, the retroaction of bolt produces and the side of rotation in impact driver
To contrary power, and workman is made not feel well.Then, it is an object of the invention to provide one
Plant the power tool that can distinguish securing member.Utilize this power tool, different at securing member
In the case of can change the control of motor.
In the electric impacting driver of the example as conventional power tool, make motor
Rotate along given direction of rotation so that percussion hammer rotates along this assigned direction and rotates along assigned direction
Anvil (for example, with reference to JP-2008-307664-A).
In the power tool of this routine, in the situation of the temperature of the inner matter not considering housing
Lower control motor.It addition, as one embodiment of the present of invention, rotate forward making motor
Or in the power tool of reversion, the heating of motor increases.Thus, in the heating of motor
Become in big power tool, if controlling motor in the case of not considering motor temperature,
Then the temperature of motor may excessively rise.It is an object of the invention to provide one can basis
The temperature of the inner matter of housing controls the power tool of motor.Utilize this power tool,
The temperature of the inner matter of housing the most excessively rises.
In conventional power tool, it is known that the percussion hammer rotated along assigned direction is given square along this
To the structure (for example, with reference to JP-2008-307664-A) clashing into anvil.
Meanwhile, applicant of the present invention's one newly developed is configured to make percussion hammer rotate and reverse
Thus clash into the electronic pulse driver of anvil.But, drive in this electronic impulse newly developed
In device, if it is long to rotate forward the time during high capacity operation, then the retroaction of impact driver
Also increase, and workman feels to increase the weight of discomfort.Therefore, it is an object of the invention to provide one
Use comfortable power tool.
Summary of the invention
It is an object of the present invention to provide a kind of percussion tool, wherein beater mechanism is by having
The percussion hammer of simple mechanism and anvil realize.
It is a further object to provide a kind of percussion tool, this percussion tool can drive
Percussion hammer and the anvil that dynamic relative rotation angle is less than 360 degree, thus driving by design motor
Dynamic method performs tightening operation.
To put 1 according to the present invention, it is provided that a kind of percussion tool, this percussion tool includes:
The motor that can drive under intermittent driving pattern；It is connected to the percussion hammer of this motor；By this
Percussion hammer clashes into thus rotates/clash into the anvil of tip end tool；And control unit, this control unit
By switching the driving pulse being supplied to motor according to the load being applied on tip end tool
Control the rotation of motor.
To put 2 according to the present invention, it is possible to provide this percussion tool, wherein control unit based on
The revolution of motor switches driving pulse.
To put 3 according to the present invention, it is possible to provide this percussion tool, wherein control unit based on
The change driving electric current of inflow motor switches driving pulse.
To put 4 according to the present invention, it is possible to provide this percussion tool, wherein control unit according to
Load on tip end tool and change the output time of driving pulse.
To put 5 according to the present invention, it is possible to provide this percussion tool, wherein control unit according to
Load on tip end tool and change the virtual value of driving pulse.
To put 6 according to the present invention, it is possible to provide this percussion tool, wherein control unit according to
Load on tip end tool and change the maximum of driving pulse.
7 are put, it is possible to provide this percussion tool, wherein intermittent driving pattern according to the present invention
Including: the first intermittent driving pattern, wherein motor is only driven along rotating forward；And second
Intermittent driving pattern, wherein motor edge rotates and reverse and is driven.
8 are put, it is possible to provide this percussion tool, wherein control unit is to electricity according to the present invention
Motivation supply driving pulse makes electric current to be driven to be supplied to the interval of motor and will not drive
Electric current is supplied to the interval of motor to be alternately present.
According to put 1, owing to motor is driven under intermittent driving pattern, and control
Unit switches the driving arteries and veins being supplied to motor according to the load condition being applied to tip end tool
Punching, so can prevent from consuming invalid electric power when the load being applied to tip end tool is light.This
Outward, be possible to prevent so-called break-off, i.e. tip end tool due to during light load with greatly
Electric power driven and separated with the head of screw or like.
According to put 2, switch driving pulse due to control unit revolution based on motor,
So the Rotating speed measring sensor loaded the most routinely can be used to perform the switching of driving pulse
Control.Furthermore, it is possible to realize the simplification for constituting control unit and/or cost reduction.
According to put 3, drive the change of electric current owing to control unit is based on inflow motor
Switch driving pulse, so the current sensor loaded the most routinely can be used to perform to drive
The switching control of moving pulse.Furthermore, it is possible to realize for constitute control unit simplification and/or
Cost reduces.
According to put 4, owing to control unit changes drive according to the load condition of tip end tool
The output time of moving pulse, it is possible to moment of torsion is clashed in regulation, suppression simultaneously is supplied to electronic
The peak point current of machine.Therefore, there is no need to expand the switch element for inverter circuit.
According to put 5, owing to control unit changes drive according to the load condition of tip end tool
The output time of moving pulse, so it is excessive that the switch element in inverter circuit can be protected to avoid
Electric current.
According to put 6, drive owing to control unit changes according to the load condition of tip end tool
The maximum of moving pulse, so nothing can be prevented from consuming when the load being applied to tip end tool is light
The electric power of effect.
According to put 7, owing to two kinds of different intermittent driving patterns include the interval that only rotates forward
Drive pattern and the intermittent driving pattern rotated and reverse, so driving in the interval only rotated forward
Can perform at a high speed fastening under dynamic model formula with relatively low tightening torque, and rotate and reverse
Fastening can be reliably performed with higher tightening torque under intermittent driving pattern.
According to put 8, owing to control unit makes to drive to motor supply driving pulse
Electric current is supplied to the interval of motor to be supplied to the interval of motor to replace with not driving electric current
Occur, so the inverter circuit of routine can be used to realize intermittent driving pattern.
In order to realize object above, the present invention provides a kind of electronic pulse driver, this electronics
Pulse driver includes: rotatable motor；Percussion hammer, this percussion hammer is by supplying from motor
The driving force answered and rotate；Anvil, this anvil is provided separately with percussion hammer and to pass through percussion hammer whole with percussion hammer
Body rotates；Tip end tool maintaining part, this tip end tool maintaining part can keep tip end tool also
And the rotation of anvil is delivered to this tip end tool；Power supply unit, this power supply unit is to motor
Supply driving electric；And control unit, this control unit controls power supply unit to supply
In the case of under the state answering driving electric, electric current at inflow motor has increased to predetermined value
Stop supplying driving electric to motor.Control unit controls power supply unit to drive in supply
To motor for should be less than the electric power for soft start of driving electric before dynamic power, in order to
Power supply unit is made to supply driving electric when percussion hammer and anvil are contacting one another.
According to this structure, by soft for being applied to motor before supply driving electric
The electric power started makes percussion hammer and anvil contacting one another.Therefore, can by shock prevent by
The moment of torsion exceeding target torque is supplied to securing member.
It addition, the present invention provides a kind of power tool, this power tool includes: with being used as power
The motor in source；Percussion hammer, this percussion hammer is connected to motor and is rotated by motor；And
Anvil, this anvil can rotate relative to percussion hammer, and can will make percussion hammer and anvil integrally rotated
One power and be supplied to percussion hammer from motor less than the second power of the first power.Second power
It is supplied to percussion hammer when motor starts to start, and the first power is at supply the second power
It is supplied to percussion hammer afterwards.
According to this structure, when being applied to percussion hammer for the pre-power started, it is therefore prevented that hit
Hammer and anvil collide each other and produce big impact.Due to this reason, it is therefore prevented that owing to hitting
Hammer the impact between anvil into shape and produce big moment of torsion.Due to this reason, tip end tool seldom with
Securable fastener is carried out more than the moment of torsion of target torque.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
It is connected to the percussion hammer of this motor；And anvil, this anvil can rotate relative to percussion hammer and can
Motor is supplied an electric power to by the first electric power with less than the second of the first electric power.Second electric power exists
Motor is supplied to motor when starting to start, and the first electric power is in the confession of the second electric power
It is supplied to motor after should.
Under this configuration, when being applied to motor for the pre-rotating forward voltage started, anti-
Stop percussion hammer and anvil has collided each other and produced big impact.Due to this reason, it is therefore prevented that
Big moment of torsion is produced due to the impact between percussion hammer and anvil.Due to this reason, tip end tool
Seldom carry out securable fastener with the moment of torsion more than target torque.
Preferably, percussion hammer can clash into anvil.
Preferably, predetermined power is supplied to motor stop to electronic by detecting
Machine is powered.
Owing to being automatically stopped to motor by this structure, so securing member can be made
Tightening torque is the most accurate.Due to this reason, can be by starting synergistic effect with pre-
Obtain high accuracy moment of torsion fastening.
Preferably, supply time of the second electric power than realize anvil and percussion hammer contacting one another time
Between long.
Make ratio of pre-starting time realize percussion hammer by this structure of use and anvil is contacting one another
Time long, percussion hammer and anvil are contacting one another within the pre-starting time.Due to this reason, anti-
Stop percussion hammer to clash into anvil and produce big impact.Due to this reason, it is possible to reduce and work as anvil and hit
The big impact produced when colliding between hammer.If pre-starting time ratio realize percussion hammer and
Anvil time contacting one another is short, then percussion hammer accelerates and clash into anvil, and big impact is from hitting
Hammer is delivered to anvil.
Preferably, this power tool also includes trigger, and this trigger can make motor lead to
Electricity, and the amount of the electric power to be supplied to motor can be changed, no matter and the second electric power
How the amount of pulling of trigger is both less than predetermined value.
Preferably, it is possible to by change pwm signal dutycycle change be supplied to electronic
The amount of the electric power of machine.
Preferably, the second electric power is less than predetermined value at predetermined amount of time.
Power tool according to the present invention, it is provided that be prevented to exceed target torque
Moment of torsion is supplied to the power tool of securing member.
In order to realize object above, the present invention provides a kind of electronic pulse driver, this electronics
Pulse driver includes: motor, and this motor can rotate and reverse；Percussion hammer, this hits
Hammer the driving force by supplying from motor into shape and rotate along forward direction or reverse directions；Anvil,
This anvil and percussion hammer be provided separately and by percussion hammer along forward direction with percussion hammer integral-rotation；Top
Ending tool maintaining part, this tip end tool maintaining part can keep tip end tool and by the rotation of anvil
Turn and be delivered to tip end tool；Power supply unit, this power supply unit supplies to be applied to rotate to motor
Rotate forward electric power, less than for rotate rotate forward electric power the rotating forward electric power for clutch or
There is the reversion electric power for clutch less than the absolute value rotating forward electric power for rotating；
And control unit, this control unit controls power supply unit so that alternately switching is for clutch
Device rotate forward electric power and for the reversion electric power of clutch, with in for being applied to just rotating
Vacation is produced in the case of the electric current of inflow motor has increased to predetermined value under the state turning electric power
Clutch, and from the generation producing false clutch stop after elapse of a predetermined time false from
Clutch.
According to this structure, due to false clutch from the generation of false clutch through predetermined
Stop after time, it is possible to suppression power consumption and intensification.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
And the output shaft rotated by this motor.If being used for making output shaft rotate along forward direction
The electric power being supplied to motor become the first power value, then can be less than the first electric power
Second power value of value is supplied to motor off and on.
Under this configuration, the second electric power is less than the first electric power.Therefore, when increasing by the second electricity
It is difficult to occur the fastening/unclamp of securing member during power.Due to this reason, high accuracy moment of torsion can be obtained.
Preferably, it is automatically stopped after the scheduled time and supplies the second power value to motor.
Under this configuration, owing to making motor be automatically stopped, it is possible to prevent excess from making
Use electric power.
Preferably, motor can be made along rotating forward side by supplying the second power value to motor
Rotate to reverse directions.
Under this configuration, when motor rotates along forward direction and reverse directions, fastening
Part is difficult to tighten or loosen.Due to this reason, high accuracy moment of torsion can be obtained.If the second electricity
Force value only in rotating forward, then is prone to fasten.
Power tool according to the present invention, it is provided that make this event when reaching preset torque
It is prone to the power tool known.Additionally, it is possible to provide difficult when enabling this event to be prone to know
Ineffectually to consume electric power and to obtain the power tool of high accuracy moment of torsion.
In order to realize object above, the present invention provides a kind of electronic pulse driver, this electronics
Pulse driver includes: motor, and this motor can rotate and reverse；Percussion hammer, this hits
Hammer into shape by being supplied to driving force to rotate along forward direction or reverse directions from motor；Anvil,
This anvil and percussion hammer are provided separately and by percussion hammer along forward direction and percussion hammer integral-rotation；Top
Tool holder, this tip end tool maintaining part can keep tip end tool and by the rotation of anvil
It is delivered to tip end tool；Power supply unit, this power supply unit to motor supply rotate forward electric power or
Reversion electric power；And control unit, this control unit controls power supply unit, in order to if worked as
Supply the electric current when rotating forward the electric current of inflow motor electric power has increased to predetermined value
Increment rate equal or exceed predetermined value, then to motor supply reverse current.
According to this structure, when the electric current of inflow motor has increased to predetermined value, will be anti-
Turn and supply an electric power to motor.Therefore, even if fastening the such as moment of torsion prolapse in target torque
The securing member of the bolt so increased etc, it is also possible to prevent from supplying the moment of torsion that inertia force causes,
And accurate target torque can be supplied.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
And the output shaft rotated by this motor.If being used for making output shaft rotate in one direction
The rotating forward electric current flowing to motor equal or exceed predetermined value, then will be used for making output shaft edge
The reverse current that the direction in opposite direction with one rotates is supplied to motor.
According to this structure, owing to rotating forward supply reversion in the case of electric current has predetermined value
Electric current, it is possible to prevent securing member to be excessively tightened owing to rotating forward the inertia of electric current.By
In this reason, accurate screw tightening torque can be obtained.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
And the output shaft rotated by this motor.If being used for making output shaft rotate in one direction
Time per unit inflow motor rotate forward electric current increment rate equal or exceed predetermined value,
Then the reverse current being used for making output shaft rotate along the direction in opposite direction with one is supplied
Motor should be given.
Under this configuration, in the case of owing to there is predetermined value in the increment rate rotating forward electric current
Supply reverse current, it is possible to prevent securing member due to the inertia of rotating forward electric current by excessively
Fastening.Due to this reason, accurate screw tightening torque can be obtained.
Power tool according to the present invention, it is provided that be capable of supply that accurate target torque
Power tool.
In order to realize object above, the present invention provides a kind of electronic pulse driver, this electronics
Pulse driver includes: motor, and this motor can rotate and reverse；Percussion hammer, this hits
Hammer the driving force by supplying from motor into shape and rotate along forward direction or reverse directions；Anvil,
Moment of torsion that this anvil and percussion hammer are provided separately and are supplied along the rotation of forward direction by percussion hammer and
Rotate；Tip end tool maintaining part, this tip end tool maintaining part can keep tip end tool and
The rotation of anvil is delivered to tip end tool；Power supply unit, this power supply unit is to motor supply
Electric power is rotated forward or for the reversion electric power coordinated for rotate；And control unit, this control
Unit processed controls power supply unit to make to hit for the reversion electric power being applied to coordinate to motor
Hammer the forward position reverse directions at the rotating forward electric power for being applied to rotation into shape to rotate to clash into anvil.
According to this structure, by the forward direction motor at the rotating forward electric power for being applied to rotation
For being applied to the reversion electric power of cooperation to make percussion hammer reversion and to be knocked on anvil.Therefore, i.e.
Make to coordinate insufficient between securing member with tip end tool, also can make securing member and tip end tool
It is fitted to each other securely, and is possible to prevent tip end tool to deviate from from securing member during operation.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
The percussion hammer rotated by this motor；And the anvil clashed into by this percussion hammer.This anvil is on percussion hammer edge just
Turn direction and clash into the forward position reverse directions rotation of anvil.
Under this configuration, owing to anvil rotates along reverse directions, so anvil and securing member can be made
Between cooperation firm.Due to this reason, securing member is seldom damaged by anvil.Due to this reason,
The durability of securing member can be strengthened.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
The percussion hammer rotated by this motor；And the anvil clashed into by this percussion hammer.Percussion hammer and anvil are at percussion hammer
The forward position reverse directions clashing into anvil along forward direction is contacting one another.
Under this configuration, it is knocked due to anvil and rotates along reverse directions, so anvil can be made
Firm with coordinating between securing member.Due to this reason, securing member is seldom damaged by anvil.By
In this reason, the durability of securing member can be strengthened.
Preferably, in the present invention, tip end tool is kept by anvil.
It addition, the present invention provides a kind of power tool, this power tool includes motor and leads to
The tip end tool maintaining part crossing this motor and rotate.This tip end tool maintaining part is configured to
Tip end tool maintaining part inverts before rotating along forward direction.
Power tool according to the present invention, it is possible to provide be prevented from tip end tool and take off from securing member
The power tool gone out.
In order to realize object above, the present invention provides a kind of electronic pulse driver, this electronics
Pulse driver includes: rotatable motor；For the switch unit making this motor be energized
Part；Gear mechanism, this gear mechanism is connected to motor, to change the rotating speed of motor；
Percussion hammer, this percussion hammer is by rotating via the driving force of gear mechanism supply from motor；Anvil,
This anvil is provided separately with percussion hammer and is rotated by the moment of torsion rotating supply by means of percussion hammer；
Tip end tool maintaining part, this tip end tool maintaining part can keep tip end tool and by the rotation of anvil
Turn and be delivered to tip end tool；Power supply unit, this power supply unit supplies driving electric to motor；
Control unit, this control unit controls power supply unit so that when supplying driving electric
The big of driving electric is changed in the case of the electric current of inflow motor has increased to predetermined threshold
Little；Temperature detecting unit, the temperature of this temperature detecting unit detection switch element；And threshold
Value change portion, this threshold value changing portion temperature based on switch element and change threshold value.
According to this structure, by considering that variations in temperature changes threshold value, can be suitably
Situation changes impact mode.
It addition, the present invention provides a kind of power tool, this power tool include motor, by
The output unit of this motor-driven and the housing of this motor of receiving.One is provided to examine
Survey the temperature detecting unit of the temperature of the inner matter of housing, and can be according to this temperature detection
The output valve of unit and change the control method of motor.
Under this configuration, the inner matter excessive heating of housing it is possible to prevent.Due to this reason,
Inner matter seldom damages because of heat.
It addition, the present invention provides a kind of power tool, this power tool include motor unit,
By the output unit of this motor-driven and the housing of this motor of receiving.Offer one can
The temperature detecting unit of the temperature of detection motor unit, and can be according to this temperature detection
The output valve of unit changes the control method of motor unit.
Under this configuration, motor unit excessive heating it is possible to prevent.Due to this reason,
Motor unit can seldom damage because of heat.
Preferably, motor unit has a circuit board, and switch element and temperature detection unit
Part is arranged on the board.
Under this configuration, by being particularly susceptible for by opening that heating is affected via circuit board detecting
Close the temperature of element, can perform control to just prevent switch element from generating heat.Due to this reason,
Switch element is difficult to damage.
According to the present invention it is possible to provide a kind of being suitable for change according to the temperature of the inner matter of housing
The power tool of the control method of power transformation motivation.
In order to realize object above, the present invention provides a kind of electronic pulse driver, this electronics
Pulse driver includes: motor, and this motor can rotate and reverse；Percussion hammer, this hits
Hammer into shape by the driving force supply from motor along rotating forward reversely or reverse directions rotation；Anvil,
This anvil is provided separately with percussion hammer and is knocked and is revolved along the rotation of forward direction by percussion hammer
Turning, this percussion hammer has obtained acceleration distance due to the rotation along reverse directions；Tip end tool is protected
Holding portion, this tip end tool maintaining part can keep tip end tool and the rotation of anvil is delivered to
Tip end tool；Power supply unit, this power supply unit is rotating forward electric power or reversion in the first circulation
Switch between electric power to be supplied to motor；And control unit, if when supplying
Under the state that should rotate forward electric power and reversion electric power, the electric current of inflow motor has increased to predetermined value
Time electric current increment rate equal to or more than threshold value, then this control unit is shorter than the first circulation
Second circulation inherence rotates forward and switches between electric power and reversion electric power.
According to this structure, if the electricity when the electric current of inflow motor has increased to predetermined value
Wood screw equal to or more than predetermined value, then is considered as putting in place by the increment rate of stream, and will just
Turn the switching cyclic switching of electric power and reversion electric power to short circulation.Therefore, can reduce
Counteracting force subsequently from the parts of pending operation.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
The percussion hammer rotated by this motor；And the anvil clashed into by this percussion hammer.If inflow motor
Electric current equal to or less than predetermined value, then percussion hammer clashes into anvil with the first interval, and if supplied
The electric current of motor should be given equal to or more than predetermined value, then percussion hammer is with shorter than the first interval by the
Anvil is clashed at two intervals.
Under this configuration, if electric current is equal to or more than predetermined value, moment of torsion is the most also made to be equal to
Or more than predetermined value, and if moment of torsion is equal to or more than predetermined value, then shorten impingement interval.
Due to this reason, increase owing to clashing within a short period of time when moment of torsion increases, so workman
Productivity ratio improve.If anvil is not knocked with the second interval, then counteracting force is big.Therefore,
The spin down of securing member and the rotating speed step-down of securing member.Due to this reason, the production of workman
Rate will reduce.
It addition, the present invention provides a kind of power tool, this power tool includes: motor；
The percussion hammer rotated by this motor；And the anvil clashed into by this percussion hammer.If flowing into electronic
The electric current of machine equals to or less than predetermined value, then percussion hammer clashes into anvil with the first interval, and if
Be supplied to the electric current of motor equal to or more than predetermined value, then percussion hammer is with shorter than the first interval
Anvil is clashed at second interval.
It addition, in another aspect of this invention, the present invention provides a kind of power tool, and this moves
Power instrument includes motor and is rotated the output shaft driven by this motor.According in motor
The electric current produced detects and puts in place.
Power tool according to the present invention, it is provided that can reduce from pending operation
The power tool of the counteracting force of parts.
In order to realize object above, the present invention provides a kind of electronic impulse as it to put 10
Driver, this electronic pulse driver includes: motor, and this motor can rotate forward and instead
Turn；Percussion hammer, this percussion hammer is by the driving force supplied from motor and along forward direction or reversion
Direction rotates；Anvil, this anvil and percussion hammer are provided separately and pass through the percussion hammer rotation along forward direction
Supply moment of torsion and rotate；Tip end tool maintaining part, this tip end tool maintaining part can keep
The rotation of anvil is also delivered to tip end tool by tip end tool；Power supply unit, this power supply unit to
Motor supply rotates forward electric power or reversion electric power；And control unit, this control unit controls
Power supply unit rotates forward electric power to make anvil whole with percussion hammer to motor supply during scheduled time slot
Body rotates, and when inverting electric power through this predetermined amount of time to motor supply, and
And this control unit controls power supply unit so that at the electric current by inverting electric power inflow motor
In the first switching circulation, electric power is being rotated forward with anti-equal to or more than in the case of the first predetermined value
Turn and switch between electric power, and second in the case of electric current is less than the first predetermined value
Circulation inherence rotates forward and switches between electric power and reversion electric power.
According to this structure, just change according to by the electric current of reversion electric power inflow motor
Turn the switching circulation of electric power and reversion electric power.Such as, if the electric current of inflow motor is big,
Then can determine that securing member is wood screw, and if this electric current little, then can determine that securing member is
Bolt.Thus, can be suitable for each securing member circulation between switch over rotating forward electric power and
Reversion electric power, and can perform suitably to fasten according to the type of securing member.
It addition, the present invention provides a kind of power tool, this power tool as it to put 9
Including motor and the output shaft that rotated along forward direction by this motor.According to when applying
Signal is so that the current value occurred when making motor invert changes the control of this motor automatically
Method.
According to this structure, owing to can judge according to the current value when making output shaft invert
The securing member rotated by output shaft, so only needing to detect the output of electric current.Due to this reason,
Owing to need not other single detection etc., so the most expensive electric tool can be obtained.
Power tool according to the present invention, it is provided that a kind of power that can distinguish securing member
Instrument.
In order to realize object above, the present invention provides a kind of electronic impulse as it to put 11
Driver, this electronic pulse driver includes: motor, and this motor can rotate forward and instead
Turn；Percussion hammer, this percussion hammer is by the driving force supplied from motor and along forward direction or reversion
Direction rotates；Anvil, this anvil is provided separately with percussion hammer, is clashed into by percussion hammer and passes through percussion hammer along just
Turning the rotation in direction and rotate, this percussion hammer has obtained acceleration due to the rotation along reverse directions
Distance；Tip end tool maintaining part, this tip end tool maintaining part can keep tip end tool and incite somebody to action
The rotation of anvil is delivered to tip end tool；Power supply unit, this power supply unit is handed in the first circulation
Alternately switching is supplied to the rotating forward electric power of motor or inverts electric power to be supplied to motor；
Temperature detecting unit, the temperature of this temperature detecting unit detection motor；And control unit,
This control unit controls power supply unit to have been raised to the feelings of predetermined value in the temperature of motor
Carry out between rotating forward electric power and reversion electric power in the second circulation longer than the first circulation under condition
Switching.
According to this structure, if the temperature of motor has been raised to predetermined value, then than
In the second circulation that one circulation is long, switching rotates forward electric power and reversion electric power.Accordingly, it is capable to suppression exists
The heating caused during switching, and the durability of whole impact driver can be strengthened.
It addition, the present invention provides a kind of electric tool, this electric tool include motor, by
The output unit of this motor-driven, accommodate the housing of this motor and this housing can be detected
The temperature detecting unit of temperature of inner matter.According to the output from this temperature detecting unit
Value changes the control method of motor.
Under this configuration, owing to supply can be changed according to the temperature of the inner matter of housing
To the value of the electric power of motor, accordingly it is possible to prevent the temperature of the inner matter of housing became
High.Due to this reason, it is possible to prevent the inner matter of housing to damage due to high temperature.
It addition, the present invention provides a kind of power tool, this power tool include motor unit,
By the output unit of this motor-driven, accommodate the housing of motor unit and electricity can be detected
The temperature detecting unit of the temperature of motivation unit.According to the output from this temperature detecting unit
Value and change the value of electric power that is supplied to motor unit.
Under this configuration, owing to can change be supplied to according to the temperature of motor unit
The value of the electric power of motor, is therefore possible to prevent the temperature of motor unit to become too high.By
In this reason, it is possible to prevent motor unit to damage due to high temperature.
Preferably, percussion hammer is connected to motor unit, and anvil can be clashed into by percussion hammer, if come
Be the first value from the output valve of temperature detecting unit, then percussion hammer clashes into anvil with the first interval, and
And the output valve if from temperature detecting unit is the second value more than the first value, then percussion hammer
Anvil is clashed into the second interval longer than the first interval.
Under this configuration, if temperature is high, then load reduction.Therefore, if motor
The temperature of unit is high, then can prevent the temperature of motor unit from rising.Due to this reason, electricity
Motivation unit seldom damages owing to the excessive temperature of motor unit rises.
It addition, in another aspect of this invention, the present invention provides a kind of power tool, and this moves
Motor that power instrument includes being driven intermittently, by the output unit of this motor-driven,
The temperature detection list of the temperature of the housing accommodating this motor and inner matter that housing can be detected
Unit.Change motor according to the output valve from this temperature detecting unit to be driven intermittently
Cycle.
Power tool according to the present invention, it is provided that a kind of can be according to the inner matter of housing
Temperature control the power tool of motor.
In order to realize object above, the present invention provides a kind of electronic impulse as it to put 12
Driver, this electronic pulse driver includes motor, and this motor can rotate and reverse；
Percussion hammer, this percussion hammer is by the driving force supplied from motor and along forward direction or reverse directions
Rotate；Anvil, this anvil is knocked and is rotated along the rotation of forward direction by percussion hammer, should
Percussion hammer has obtained acceleration distance due to the rotation along reverse directions；Tip end tool maintaining part,
This tip end tool maintaining part can keep tip end tool and the rotation of anvil is delivered to top work
Tool；Power supply unit, this power supply unit is alternately carried out between rotating forward electric power or reversion electric power
Switching is to be supplied to motor；And control unit, this control unit controls power supply unit
To have additional supply of cycle and the confession of reversion electric power along with the increase of electric current of inflow motor
The ratio in the cycle of electric power should be rotated forward.
According to this structure, the ratio in returing cycle and the cycle of rotating forward is along with inflow motor
The increase of electric current and increase.Accordingly, it is capable to suppression is from the retroaction of the parts of pending operation
Power, and can provide a kind of and use comfortable percussion tool.
13 are put, it is preferable that control unit increases at the electric current flowing into motor according to the present invention
It is added in the first step of predetermined value rotate forward first mould rotating forward period shortening of electric power in supply
Control power supply unit under formula, and exceed the second of predetermined value at the electric current of inflow motor
Step controls power supply under the second pattern that the reversion period of supply reversion electric power lengthens single
Unit.
According to this structure, if the electric current of inflow motor is equal to or less than predetermined value, then
Fastening is performed, and if electric current is more than this is pre-under the first mode concentrated in thrust
Definite value, then perform fastening under the second pattern concentrated in impact force.Therefore, it can
It is best suitable under the pattern of this securing member performing fastening.
To put 14 according to the present invention, it is preferable that control unit can in the second step from
There is one pattern of selection in multiple second patterns of different ratio.
According to this structure, even if the electric current of inflow motor increases the most suddenly, it is also possible to
Suitably perform fastening under impact mode.
15 are put, it is preferable that in the second step, control unit is only held according to the present invention
Perhaps have in the middle of multiple second patterns of different ratio from second mould with the short reversion period
Formula is transformed into second pattern with the long reversion period.
According to this structure, it is possible to prevent sensorial unexpected change.
16 are put, it is preferable that in the second step, control unit is only held according to the present invention
Permitted to be transformed into that to have the length in the middle of multiple second patterns of different ratio adjacent with returing cycle
The second pattern.
According to this structure, it is possible to prevent sensorial unexpected change.
It addition, the present invention provides a kind of power tool, this power tool as it to put 17
Including the motor being driven intermittently, by the percussion hammer of this motor-driven and hit by this percussion hammer
The anvil hit.The time that percussion hammer rotates forward is gradually shortened.
Under this configuration, the time rotated forward due to percussion hammer is gradually shortened, between the shock of percussion hammer
Every as one man shortening with the load being gradually increased.Due to this reason, the retroaction to workman
Power reduces, and can obtain the power work being difficult to slip and have good productivity from securing member
Tool.
It addition, the present invention provides a kind of power tool, this power tool as it to put 18
Including the motor being driven intermittently, by the percussion hammer of this motor-driven and hit by this percussion hammer
The anvil hit.The time of percussion hammer reversion gradually lengthens.
By this structure, owing to the time of percussion hammer reversion gradually lengthens, so percussion hammer is anti-
Turning amount to increase along with the reduction of the rotation amount of anvil, wherein the rotation amount of anvil is along with load
Be gradually increased and reduce.Due to this reason, the acceleration gap of percussion hammer can be expanded.Due to this
Reason, can clash into anvil by reliably making percussion hammer accelerate, and anvil can be clashed into effectively.
Due to this reason, the power tool with good productivity can be obtained.
It addition, the present invention provides a kind of power tool, this power tool as it to put 19
Including: the motor being driven intermittently；By the percussion hammer of this motor-driven；By this percussion hammer
The anvil clashed into；And the detection device of the value of the electric current of inflow motor can be detected.First
Current value, the second current value more than the first current value and the 3rd electricity more than the second current value
Flow valuve can inflow motor.Can be by the first mode according to the first current value, basis
Second pattern of the second current value and perform control according to the 3rd pattern of the 3rd current value.
If the detection device of motor has detected that the first current value, control in the flrst mode
Perform control the most under the second mode, and examine immediately after the first current value being detected
Survey the 3rd current value.
Under this configuration, even if current value changes the most suddenly (such as, even if from the first electricity
Flow valuve becomes the 3rd current value), pattern also will not change suddenly (make from first mode to
The change (not making the unexpected change to the 3rd pattern) of the second pattern).Therefore, workman
Sense of discomfort is seldom felt due to the change of pattern.Due to this reason, can obtain have good
The power tool of good transaction capabilities.
It addition, the present invention provides a kind of power tool, this power tool as it to put 20
Including: the motor being driven intermittently；By the percussion hammer of this motor-driven；By this percussion hammer
The anvil clashed into；And the detection device of the value of the electric current of inflow motor can be detected.First
Current value and can inflow motor more than the second current value of the first current value.Can pass through
First mode according to the first current value and perform control according to the second pattern of the second current value
System.Control is performed the most in the flrst mode after performing in the flrst mode to control, but
Control is performed under second pattern.
Under this configuration, even if lightening during being supported on screw fastening, the pattern of voltage is also
The pattern for light load will not be become.Therefore, pattern gradually becomes for heavy duty mould
Formula.Due to this reason, will not repeat for light load and heavy duty pattern.Owing to this is former
Cause, can obtain workman and use the power tool felt good.
21 are put, it is preferable that more than the 3rd current value of the second current value according to the present invention
Can inflow motor, control can be performed by the 3rd pattern according to the 3rd current value,
And under the second pattern or the 3rd pattern, perform control after control under the second mode.
It addition, the present invention provides a kind of power tool, this power tool as it to put 22
Including: the motor being driven intermittently；By the percussion hammer of this motor-driven；By this percussion hammer
The anvil clashed into；And the detection device of the value of the electric current of inflow motor can be detected.First
Current value, the second current value more than the first current value and the 3rd electricity more than the second current value
Flow valuve can inflow motor.Can be by according to the first mode of the first current value, according to the
Second pattern of two current values and perform control according to the 3rd pattern of the 3rd current value.As
Fruit has detected that the first current value and has detected that the 3rd current value is then after first mode
Perform control in a third mode.
Under this configuration, if having detected that current value becomes big and load change big, then can
Under the pattern according to this load, operation is performed by becoming the pattern according to load.Due to
This reason, can obtain the power tool with good working performance.
It addition, in another aspect of this invention, the present invention provides a kind of as it to put 23
Power tool, this power tool includes the motor being driven intermittently, is driven by this motor
Dynamic percussion hammer and the anvil clashed into by this percussion hammer.Can automatically change the control method of this motor.
24 are put, it is preferable that automatically change according to the load on motor according to the present invention
The control method of motor.
25 are put, it is preferable that the load of motor is to produce in the motor according to the present invention
Raw electric current.
26 are put, it is preferable that automatically change motor according to time quantum according to the present invention
Control method.
Power tool according to the present invention, it is provided that the power work in use felt good
Tool.
Above and other objects of the present invention and novel feature are by from the following description to description
Apparent with accompanying drawing.
Accompanying drawing explanation
Fig. 1 illustrates the sectional view of the percussion tool 1 relevant to embodiment.
Fig. 2 illustrates the outward appearance of the percussion tool 1 relevant to this embodiment.
Fig. 3 illustrates the enlarged drawing around the knocking gear 40 of Fig. 1.
Fig. 4 illustrates the cooling fan 18 of Fig. 1.
Fig. 5 illustrates the motor-driven control system of the percussion tool relevant to this embodiment
Functional block diagram.
Fig. 6 illustrates the percussion hammer 151 that the basic structure (the second embodiment) to the present invention is relevant
With anvil 156.
Fig. 7 illustrates the percussion hammer 151 of Fig. 6 and six stages clashing into operation of anvil 156.
Fig. 8 illustrates percussion hammer 41 and the anvil 46 of Fig. 1.
Fig. 9 illustrates percussion hammer 41 and the anvil 46 of the Fig. 1 observed from different perspectives.
Figure 10 illustrates the shock operation of the percussion hammer 41 shown in Fig. 8 and 9 and anvil 46.
Figure 11 illustrates and triggers signal, inverter circuit during percussion tool 1 operates
Drive signal, the rotating speed of motor 3 and percussion hammer 41 and the crash situation of anvil 46.
Figure 12 illustrates the driving rate-determining steps of the motor 3 relevant to this embodiment.
Figure 13 illustrates and is applied to motor under pulse mode (1) and pulse mode (2)
Electric current and the curve chart of revolution.
Figure 14 illustrates the motor relevant to this embodiment driving under pulse mode (1)
Dynamic control flow.
Figure 15 illustrates the relation between revolution and the elapsed time of motor 3 and is applied to
Relation between electric current and the elapsed time of motor 3.
Figure 16 illustrates the motor 3 relevant to this embodiment under pulse mode (2)
Drive control flow.
Figure 17 is the sectional view of the electronic pulse driver relevant to the 3rd embodiment.
Figure 18 is the control block diagram of the electronic pulse driver relevant to the 3rd embodiment.
Figure 19 illustrates percussion hammer and the anvil of the electronic pulse driver relevant to the 3rd embodiment
Mode of operation.
Figure 20 illustrates and creeps into mould in the electronic pulse driver relevant to the 3rd embodiment
Control under formula.
Figure 21 illustrates when the clutch in the electronic pulse driver relevant to the 3rd embodiment
Control during fastening bolt under device pattern.
Figure 22 illustrates when the clutch in the electronic pulse driver relevant to the 3rd embodiment
Control during wood screw is fastened under device pattern.
Figure 23 illustrates when the pulse in the electronic pulse driver relevant to the 3rd embodiment
Control during fastening bolt under pattern.
Figure 24 illustrates in following control in this case, it may be assumed that when with the 3rd embodiment
It is not carried out being transformed into the when fastening wood screw under the pulse mode of relevant electronic pulse driver
The situation of two pulse modes.
Figure 25 illustrates in following control in this case, it may be assumed that when with the 3rd embodiment
Perform to be transformed into second when fastening wood screw under the pulse mode of relevant electronic pulse driver
The situation of pulse mode.
Figure 26 is when the clutch mould in the electronic pulse driver relevant to the 3rd embodiment
Flow chart during securable fastener under formula.
Figure 27 is when the pulse mode in the electronic pulse driver relevant to the 3rd embodiment
Flow chart during lower securable fastener.
Figure 28 illustrates the clutch in the electronic pulse driver relevant to the 4th embodiment
The changes of threshold during wood screw is fastened under pattern.
Figure 29 illustrates the pulse mode in the electronic pulse driver relevant to the 4th embodiment
The changes of threshold during wood screw is fastened under formula.
Figure 30 illustrates the pulse mode in the electronic pulse driver relevant to the 5th embodiment
The change of the switching cycle rotated and reverse during wood screw is fastened under formula.
Figure 31 is showing the stream of the remodeling of the electronic pulse driver relevant to this embodiment
Cheng Tu.
Figure 32 is the sectional view of the electronic pulse driver relevant to sixth embodiment.
Figure 33 illustrates percussion hammer and the anvil of the electronic pulse driver relevant to sixth embodiment
Mode of operation.
Figure 34 is when the pulse mode in the electronic pulse driver relevant to sixth embodiment
Under schematic diagram when unclamping wood screw.
Detailed description of the invention
Hereinafter with reference to accompanying drawing, embodiment is described.In the following description, up and down, front and back and left
Right direction is corresponding with the direction shown in Fig. 1 and 2.
Fig. 1 illustrates the percussion tool 1 according to an embodiment.Percussion tool 1 is filling
Electricity set of cells 30 drives knocking gear 40 as power supply and using motor 3 as driving source,
And it is supplied to the anvil 46 as output shaft using rotating and clashing into, with by continuous moment of torsion or interval
Impact dynamic be delivered to tip end tool (not shown), the drill bit of such as driver, thus
Perform the operation that such as screw tightening or bolt are tightened etc.
Motor 3 is brushless DC motor, and is incorporated in from the side in substantially T
In tubulose stem portion 6a of the housing 6 of shape.Housing 6 is removable is divided into two substantially symmetric right sides
Parts and left part part, and right members and left part part fixed by multiple screws.Such as, housing 6
Right members and left part part in one (in this embodiment for left part part) be formed multiple
Screw bosses 20, and another one (in this embodiment for right members) is formed with multiple spiral shell
Hole (not shown).In stem portion 6a, the rotary shaft 19 of motor 3 is by being positioned at rear end
The bearing 17b and the bearing 17a arranged around central part at place rotatably keep.On
Face is mounted with the plate of six switch elements 10 and is arranged at the rear portion of motor 3, and by right
These switch elements 10 carry out inversion control and carry out electric rotating motivation 3.Such as Hall element or suddenly
The position of rotation detecting elements 58 such as you IC are loaded on the front portion of plate 7, to detect rotor 3a
Position.
In housing 6, grip part 6b the most vertically and integrally extends from stem portion 6a
Out.It is upper that trigger switch 8 and forwards/reverse changer lever 15 are arranged in the 6b of grip part
Portion.The trigger operation portion 8a of trigger switch 8 is pushed by spring (not shown) and from holding
Hold portion 6b to highlight.For being controlled the speed of motor 3 by trigger operation portion 8a
Control circuit plate 9 is accommodated in the bottom of grip part 6b.Cell holding portion 6c is formed at gripping
The bottom of portion 6b, and include the set of cells 30 of multiple ni-mh or lithium ionic cell unit with
It is removably mounted on cell holding portion 6c.
Cooling fan 18 be positioned at the front portion of motor 3 and be attached to rotary shaft 19, with rotation
Rotating shaft synchronous rotary.The air intake at the cooling configured rear portion in stem portion 6a of fan 18
26a and 26b sucks air.The air sucked in stem portion 6a from being formed at cooling wind
Multiple gap 26c (seeing Fig. 2) around the outer radial periphery side of fan 18 are discharged into housing 6
Outside.
Knocking gear 40 includes anvil 46 and percussion hammer 41.Percussion hammer 41 is fixed and is connected planet
The multiple planetary rotary shaft of gear reduction 21.With now widely used routine
Beater mechanism is different, and percussion hammer 41 does not includes having mandrel, spring, cam groove, ball
Deng cam mechanism.Anvil 46 and percussion hammer 41 by fitted shaft 41a and are formed in its rotation
Fit 46f around the heart is connected to each other so that be only capable of holding between anvil 46 and percussion hammer 41
Row rotates against less than a circle.In the front end of anvil 46, it is integrally formed for installing top work
Have the output shaft of (not shown) and there is the installing hole 46a of hexagonal cross-sectional shape vertically.
The rear side of anvil 46 is connected to fitted shaft 41a of percussion hammer 41, and is kept by metal bearing 16a
Can to rotate relative to shell 5 around axial centre.Anvil 46 and percussion hammer 41 detailed
Shape is described further below.
Shell 5 is integrally formed by metal, is used for receiving knocking gear 40 and planetary gear speed-reduction
Mechanism 21, and it is arranged on the front side of housing 6.The outer circumferential side of shell 5 is coated with by resin
The cover cap 11 made, in order to prevent heat transfer and absorb impact etc..The top of anvil 46 includes
For removably attaching sleeve 15 and the ball 24 of tip end tool.Sleeve 15 includes
Spring 15a, packing ring 15b and snap ring 15c.
When pulling trigger operation portion 8a and motor 3 starts, the rotating speed of motor 3
Lowered by planetary gear reducing mechanism 21, and percussion hammer 41 is with the rotating speed with motor 3
The revolution becoming given speed reducing ratio rotates.When percussion hammer 41 rotates, its moment of torsion is passed to anvil 46,
And anvil 46 starts to rotate with the speed identical with percussion hammer 41.When the power being applied to anvil 46 is led to
Crossing when the counteracting force that tip end tool side joint is received becomes big, control unit detects that fastening is anti-and makees
Increase firmly, and before motor 3 stops the rotation (motor 3 is locked),
Percussion hammer 41 is given either continuously or intermittently driven while changing the drive pattern of percussion hammer 41.
Fig. 2 illustrates the outward appearance of the percussion tool 1 of Fig. 1.Housing 6 include three parts 6a,
6b and 6c, and it is formed at cold in stem portion 6a for discharging the gap 26c of cooling air
But around the outer radial periphery side of fan 18.Control panel 31 is arranged on cell holding portion 6c's
On upper surface.Various operation buttons, display lamp etc. are arranged in control panel 31, such as, use
In opening/close the switch of LED 12 and for confirming the button of the dump energy of set of cells
It is arranged on control panel 31.Such as, the drive pattern for switching motor 3 (creeps into
Pattern and conflicting model) toggle switch 32 be arranged on the side of cell holding portion 6c.
If pressure toggle switch 32, the most alternately switching drill mode and conflicting model.
Set of cells 30 includes being positioned at the release button 30A on both sides around, and can pass through
While pressing release button 30A, mobile battery group 30 makes set of cells 30 protect with battery
Hold portion 6c to separate.Metal tape hook 33 is detachably attached to cell holding portion 6c's
One of right side and left side.Although band hook 33 is attached to the left side of percussion tool 1 in fig. 2,
But band hook 33 can separate and be attached to right side with percussion tool.Band 34 is attached in electricity
Around the rear end of pond maintaining part 6c.
Fig. 3 illustrates the enlarged drawing around the knocking gear 40 of Fig. 1.Planet-gear speed reducer
Structure 21 is gear type.It is connected to the sun gear on the top of the rotary shaft 19 of motor 3
21a plays the effect of drive shaft (power shaft), and multiple planetary gear 21b is being fixed
Rotate in external gear 21d in stem portion 6a.Multiple rotary shafts 21c of planetary gear 21b
Kept by the percussion hammer 41 as planet carrier.Percussion hammer 41 is along the direction identical with motor 3
Rotate with given speed reducing ratio, as the driven shaft (output shaft) of planetary gear reducing mechanism 21.
Based on such as fastener (screw or bolt) and the output of motor 3 and the fastening of requirement
Moment of torsion etc because usually setting this speed reducing ratio.In the present embodiment, this speed reducing ratio is set
For make the revolution of percussion hammer 41 become motor 3 revolution about 1/8 to 1/15.
Interior cover cap 22 is arranged on the inner circumferential side of two screw bosses 20 within stem portion 6a.
Interior cover cap 22 is manufactured by the Unitarily molded of the synthetic resin of such as plastics etc.Cylindrical part
Point it is formed at the rear side of interior cover cap, and the rotary shaft of rotatably fixed motor 3
The bearing 17a of 19 is kept by the cylindrical portion of interior cover cap.There is the tubular of two different-diameters
Step-like portion is arranged on the front side of interior cover cap 22.It is less that ball bearing 16b is arranged at diameter
Step-like portion, and a part of external gear 21d inserts the cylinder that is relatively large in diameter from front side
Shape step-like portion.Owing to external gear 21d is attached to interior cover cap 22 in non-rotatable mode
And interior cover cap 22 is attached to stem portion 6a of shell 6 in non-rotatable mode, beyond institute
Gear 21 is fixed on non-rotatable state.The peripheral part of external gear 21d includes being formed
The flange portion of external diameter, and O 23 greatly is arranged on this flange portion and interior cover cap 22
Between.Oils and fats (not shown) is applied to percussion hammer 41 and the rotating part of anvil 46, and O
Shape circle 23 performs sealing and makes oils and fats will not leak into interior cover cap 22 side.
In the present embodiment, percussion hammer 41 plays the multiple rotary shafts keeping planetary gear 21b
The effect of the planet carrier of 21c.Therefore, the rear end of percussion hammer 41 extends to the interior of bearing 16b
All sides.The rear inner peripheral portion of percussion hammer 41 is arranged in tubular in space, space storage in this tubular
It is attached to the planetary gear 21a of the rotary shaft 19 of motor 3.The cooperation protruded axially forward
Axle 41a is formed at the front central axis of percussion hammer 41, and fitted shaft 41a be formed at
The cylindrical fit groove 46f of rear center's axis of anvil 46 coordinates.By fitted shaft 41a and
The connection of fit 46f axle journal makes both relative to each other to rotate.
Fig. 4 illustrates cooling fan 18.Entirety by the synthetic resin of such as plastics etc
Molding manufactures cooling fan 18.The center of rotation of this cooling fan is formed with rotary shaft 19 and wears
The through hole 18a crossed, defines cylindrical portion 18b, wherein this cylindrical portion and rotor 3a phase
Away from the rotor 3a to set a distance in the axial direction to cover rotary shaft 19 to set a distance, and at cylinder
The outer circumferential side of shape part 18b forms multiple fin (fin) 18c.Annular section is arranged on each
The front side of fin 18c and rear side, and (be not only cooling fan 18 from axially rear side
Direction of rotation) air that sucks is from multiple opening 18d of the peripheral being formed at cooling fan
The most outwards discharge.Owing to cooling fan 18 possesses the function of so-called centrifugal fan,
And it is directly connected to the rotary shaft 19 of motor 3 and is not passed through planetary gear reducing mechanism 21
And rotating with the revolution of sufficiently above percussion hammer 41, it can be ensured that sufficiently air capacity.
It follows that motor-driven control system will be described structurally and operationally with reference to Fig. 5.
Fig. 5 illustrates motor-driven control system.In the present embodiment, motor 3 includes three
Phase brushless DC motor.This brushless DC motor is so-called inner-rotor-type, and has
Rotor 3a, stator 3b and three position of rotation detecting elements (Hall element) 58, rotor
3a includes permanent magnet (magnet), and permanent magnet includes many groups (being two groups in this embodiment)
N-S pole, stator 3b is made up of threephase stator winding U, V and the W being wound as stator, rotation
Turning position detecting element 58 circumferentially such as becomes 60 degree to arrange to detect rotor with given interval
The position of rotation of 3a.Based on the position detection signal from position of rotation detecting element 58, control
The energising direction of stator winding U, V and W processed and time, thus electric rotating motivation 3.Rotation
Turn position detecting element 58 on plate 7, be arranged at the position of the permanent magnet 3c towards rotor 3a.
The electronic component being loaded on plate 7 includes six switch elements connected as three-phase bridge
Q1 to Q6, such as FET.The respective gates (gate) of six switch element Q1 to Q6 of bridge joint
It is connected to the control signal output circuit 53 being loaded on control circuit plate 9, and six are opened
Respective drain (the drain)/source electrode (source) closing element Q1 to Q6 is connected to be wound as
Stator winding U, V and W of stator.Thus, six switch element Q1 to Q6 by from
The switch element of control signal output circuit 53 input drives signal (to drive signal, such as
H4, H5 and H6) perform handover operation, and power to stator winding U, V and W,
The DC voltage of the set of cells 30 being wherein applied to inverter circuit 52 is three-phase voltage (U
Phase, V phase and W phase) Vu, Vv, Vw.
Signal is driven (to drive the corresponding signal of six switch element Q1 to Q6 at switch element
Three-phase signal) in the middle of, three negative electricities source switch element Q4, Q5 and Q6 will be used for
Driving signal as pulse width modulating signal (pwm signal) H4, H5 and H6 supply
Should, and the pulse width (dutycycle) of pwm signal is by being loaded in control circuit plate 9
On computing unit 51 trigger operation based on trigger switch 8 portion 8a operational ton (OK
Journey) detection signal change, thereby regulate the delivery to motor 3 and control electricity
The starting/stopping of motivation 3 and rotating speed.
Pwm signal is supplied to the positive electrical source switch element Q1 of inverter circuit 52
To Q3 or negative electricity source switch element Q4 to Q6, and by high speed COMS bus exchange switch element
Q1 to Q3 or switch element Q4 to Q6 controls from the DC voltage of set of cells 30 to fixed
Sub-winding U, V and W power.In the present embodiment, pwm signal is supplied to negative pole
Source-side switches element Q4 to Q6.Accordingly, it is capable to by the pulse width controlling pwm signal
Degree controls the rotating speed of motor 3, thus regulation is supplied to each stator winding U, V and W
Electric power.
Percussion tool 1 includes the forwards/reverse switching of the direction of rotation for switching motor 3
Bar 14.As long as direction of rotation initialization circuit 62 detects the change of forwards/reverse changer lever 14,
Just the control signal being used for the direction of rotation of switching motor is delivered to computing unit 51.Meter
Calculate the CPU that unit 51 includes carrying out output drive signal based on processing routine and data
(CPU), storage processing program or control the ROM of data and interim storage data
RAM, timer etc., but not shown.
Control signal output circuit 53 is formed and is used for based on direction of rotation initialization circuit 62 and turns
The alternating output signal ground switching predetermined switch element Q1 to Q6 of sub-position detecting circuit 54
Driving signal, and this driving signal is exported control signal output circuit 53.This hands over
The predetermined winding wire alternately making stator winding U, V and W is energized, and makes rotor 3a along setting
Fixed direction of rotation rotates.In this case, based on the output applying voltage setting circuit 61
Control signal is applied to the driving signal conduct of negative electricity source switch element Q4 to Q6
PWM modulation signal exports.It is supplied to the value of electric current of motor 3 by current detection circuit 59
Measure, and be adjusted to the driving set when the value of electric current is fed back to computing unit 51
Electric power.Pwm signal can be applied to positive electrical source switch element Q1 to Q3.
The impact sensor 56 of the size of the impact that detection produces in anvil 46 is connected to
The control unit 50 being loaded on control circuit plate 9, and its output is via impact inspection
Slowdown monitoring circuit 57 is input to computing unit 51.Impact sensor 56 can be by being attached to anvil
The deformeters of 46 etc. realize, and when the output utilizing impact sensor 56 is turned round with normal
When square completes fastening, motor 3 can be automatically stopped.
It follows that describing the shock operation of percussion hammer 41 related to the present embodiment and anvil 46
Before, percussion hammer and the basic structure of anvil will be described with reference to Fig. 6 and 7 and clash into operating principle.
Fig. 6 illustrates the percussion hammer 151 relevant to basic structure (the second embodiment) and anvil 156.Hit
Hammer 151 is formed with one group of protuberance, i.e. from axially projecting prominent of cylindrical body portion 151b
Portion 152 and protuberance 153.It is centrally formed with before main part 151b and is formed at anvil 156
Fitted shaft 151a that coordinates of the fit (not shown) at rear portion, and percussion hammer 151 He
It is (little that anvil 156 is attached together to can relative to each other rotate the given angle enclosed less than
In 360 degree).Protuberance 152 is used as to clash into ratchet, and has and be formed along circumference
Flat shock side surface 152a and 152b of both sides.Percussion hammer 151 also include for protuberance
152 protuberances 153 keeping spin balancing.Owing to protuberance 153 plays for obtaining rotation
The effect of the counterweight part of balance, so not forming shock side surface.
Round plate 151c is formed at the rear side of main part 151b via connecting portion 151d.Main body
Space between portion 151b and round plate 151d is arranged to arrange the row of planetary gears 21
Star gear 21b, and round plate 151d is formed with the rotation for keeping planetary gear 21b
The through hole 151f of axle 21c.Although not shown, but for keeping the rotation of planetary gear 21b
The retaining hole of axle 21c is also formed in the side towards round plate 151d of main part 151b.
Anvil 156 is formed with the front for tip end tool is arranged on cylindrical body portion 156b
Installing hole 156a, and two protuberances 157 projected radially outwardly from main part 156b
With 158 rear sides being formed at main part 156b.Protuberance 157 is to have to be knocked side surface
The shock ratchet of 157a and 157b, and be that protuberance 158 does not have and is knocked side surface
Counterweight part.Owing to protuberance 157 is suitable for colliding with protuberance 152, so that outside it
Footpath is equal to the external diameter of protuberance 152.Two protuberances 153 being used only as counterweight become with 158
Type is not for interfere and not collide with any part.In order to make percussion hammer 151
And the anglec of rotation between anvil 156 big as far as possible (maximum is enclosed less than), makes protuberance 153
Less to increase circumferential lengths with the radial thickness of 158, thus maintain protuberance 152 and 157
Between spin balancing.Very big by relative rotation angle is set to, can obtain when making to hit
The big acceleration area (rise and turn (run-up) interval) of percussion hammer when hammer and anvil collide, and
Shock can be performed with sizable energy.
Fig. 7 illustrates six of the circle motion under the use state of percussion hammer 151 and anvil 156
The individual stage.The section of Fig. 7 is with axially vertical, and includes clashing into side surface 152a (Fig. 6).
When Fig. 7 (1), although the tightening torque received from tip end tool is little, but anvil 156
Rotated counterclockwise by the thrust of percussion hammer 151.But, when tightening torque does not becomes greatly and not
When may only be rotated by the thrust of percussion hammer 151, owing to anvil 156 is clashed into by percussion hammer 151,
So motor 3 starts reversion to make percussion hammer 151 invert along the direction of arrow 161.Logical
Cross and make motor 3 start reversion when shown in (1), so that percussion hammer 151
Protuberance 152 rotates along the direction of arrow 161, and makes motor 3 invert further,
Protuberance 152 accelerates by protuberance 158 in the direction along arrow 162 as shown in (2)
Outer circumferential side while rotate.Similarly, the external diameter R of protuberance 158 is madea1Less than protuberance
The internal diameter R of 152h1, therefore two protuberances will not collide each other.Make protuberance 157
External diameter Ra1Internal diameter R less than protuberance 153h1, therefore two protuberances will not be sent out each other
Raw collision.If protuberance is constituted with this position relationship, then can make percussion hammer 151 and anvil 156
Relative rotation angle more than 180 degree, and can guarantee that percussion hammer 151 is relative to anvil 156
Fully reverse angle.
When percussion hammer 151 inverts and arrive the Fig. 7 (3) as shown in arrow 163a further
Position (stop position of reversion) time, the rotation of motor 3 stops section preset time,
Then motor 3 starts direction (forward direction) rotation along arrow 163b.When percussion hammer 151
During reversion, it is important that make percussion hammer 151 reliably stop at stop position so that will not be with anvil
156 collide.Although percussion hammer 151 is before the position that percussion hammer and anvil 156 collide
Stop position is arbitrarily to set, it may be desirable to tightening torque as requested and make stop position
The biggest.Stop position need not be set as same position every time, and in fastening
Starting stage in reverse angle can be made little, and along with fastening carries out reverse angle being set
Obtain greatly.If making stop position to change in this way, then due to can will reversion needed for
Time is set as minimum, so can perform the most rapidly to clash into operation.
Then, percussion hammer 151 enters through the position of Fig. 7 (4) in the direction along arrow 164
One step accelerate, and the shock side surface 152a of protuberance 152 under acceleration mode at Fig. 7
(5) position shown in collides with the side surface 157a that is knocked of anvil 156.As
The result of this collision, powerful rotation torque is passed to anvil 156, and anvil 156 is along arrow
The direction shown in 166 rotates.The position of Fig. 7 (6) is both percussion hammer 151 and anvil 156
The most rotated the state of given angle from the state of Fig. 7 (1), and by again repeat from
Fastening main element is fastened to appropriately turn round by the state shown in Fig. 7 (1) to Fig. 7 (5)
Square.
As it has been described above, in the percussion hammer 151 relevant to the second embodiment and anvil 156, use
The drive pattern of motor 3 reversion, utilizes percussion hammer 151 and anvil 156 as knocking gear
Simple structure realizes percussion tool.In the knocking gear of this structure, it is also possible to by setting
Determine the drive pattern of motor 3 to make motor rotate in the drilling mode (s).Such as, boring
Under progressive die formula, only by making motor 3 rotate from the state of Fig. 7 (5) so that percussion hammer 151
Along rotating forward, percussion hammer can be made to rotate to follow anvil 156 as Fig. 7 (6).Cause
This, by repeating this step, can fasten at a high speed and can make little to be tightened of tightening torque
Parts, such as screw or bolt.
In percussion tool 1 related to the present embodiment, use brushless DC motor conduct
Motor 3.Therefore, flow into electronic by calculating from current detecting unit 59 (seeing Fig. 5)
The value of the electric current of machine 3, the value of detection electric current has become greater than the state of set-point, and makes
Computing unit 51 stops motor 3, can realize electronically after being fastened to given moment of torsion
Interrupt the so-called clutch mechanism of power transmission.Therefore, impact related to the present embodiment
Instrument 1 can also realize the clutch mechanism during drill mode, and can be by tool
The knocking gear having simple structure realizes having the drill mode without clutch, band clutch
The drill mode of device and the multiplex fastening instrument of conflicting model.
It follows that the knocking gear 40 shown in Fig. 1 and 2 will be described with reference to Fig. 8 and 9
Detailed construction.Fig. 8 illustrates the percussion hammer 41 relevant to first embodiment and anvil 46, wherein hits
Hammer 41 is from watching the most obliquely, and anvil 46 is watched the most obliquely.
Fig. 9 illustrates percussion hammer 41 and anvil 46, and wherein percussion hammer 41 is watched the most obliquely,
And anvil 46 is from watching the most obliquely.Percussion hammer 41 is formed from cylindrical body portion 41b
Two radially projecting blade part 41c and 41d.Although blade part 41d and 41c is formed respectively
Have an axially projecting protuberance, but this structure and the basic structure shown in Fig. 6 (second is real
Execute example) difference be that one group of shock portion and a set of weights portion are respectively formed at blade part
In 41d and 41c.
The peripheral part of blade part 41c has fan-shaped, and protuberance 42 is from peripheral part axle
To the most prominent.Fan-shaped part and protuberance 42 had both played shock portion (shock ratchet)
Effect, plays again the effect of counterweight part.Clash into side surface 42a and 42b and be formed at protuberance
42 both sides circumferentially.Two clash into side surface 42a and 42b and are all shaped to flat surface, and
And provide the angle of appropriateness so that also the side surface (hereinafter will describe) that is knocked with anvil 46 enters
Row surface contacts.Meanwhile, blade part 41d is shaped to have fan-shaped peripheral part, and wind
The quality of sector portion increases due to its shape.Therefore, blade part also serves as counterweight part.
Additionally, define the protuberance protruded axially forward around the radial center of blade part 41d
43.Protuberance 43 is used as shock portion (shock ratchet), and clashes into side surface 43a and 43b
It is formed at protuberance both sides circumferentially.Two clash into side surface 43a and 42b and are all shaped to
Flat surface, and circumferentially provide appropriateness angle in case same and anvil 46 be knocked side table
Face (hereinafter will describe) carries out surface contact.
Fitted shaft 41a being coupled in fit 46f of anvil 46 is formed at main part 41b
Axial centre around front side.Connecting portion 44c is formed at the rear side of main part 41b, should
Connecting portion 44c connects two round plate 44a and 44b to make in two positions circumferentially
It plays planet carrier effect.Through hole 44d is respectively formed at the edge of round plate 44a and 44b
Two positions of circumference, two planetary gear 21b (seeing Fig. 3) are arranged in round plate 44a
And between 44b, and rotary shaft 21c (seeing Fig. 3) of planetary gear 21b is arranged on logical
On the 44d of hole.Cylindrical part 44e extended with drum is formed at the rear side of round plate 44b.
The outer circumferential side of cylindrical part 44e is maintained at inside bearing 16b.Sun gear 21a (sees figure
3) it is arranged in the space 44f inside cylindrical part 44e.The most not only in intensity and also
In weight, the percussion hammer 41 shown in Fig. 8 and 9 and anvil 46 are fabricated to metallic monoliths.
Anvil 46 be formed from two radially projecting for cylindrical body portion 46b blade part 46c and
46d.Protuberance 47 prominent axially backward is formed at the peripheral of blade part 46c.Quilt
Clash into side surface 47a and 47b and be formed at protuberance 47 both sides circumferentially.Meanwhile, axially
Rearwardly projecting protuberance 48 is formed at around the radial center of blade part 46d.It is knocked side
Surface 48a and 48b is formed at protuberance 48 both sides circumferentially.When percussion hammer 41 rotates forward (tight
Gu the direction of rotation of screw etc.) time, shock side surface 42a is resisted against and is knocked side surface 47a
On, shock side surface 43a is resisted against and is knocked on side surface 48a simultaneously.When percussion hammer 41 is anti-
When turning (unclamping the direction of rotation of screw etc.), shock side surface 42b is resisted against and is knocked side
On the 47b of surface, shock side surface 43b is resisted against and is knocked on side surface 48b simultaneously.Prominent
Go out portion 42,43,47 and 48 be shaped to simultaneously two positions against.
Thus, according to the percussion hammer 41 shown in Fig. 8 and 9 and anvil 46, due to about rotation
Rotating shaft performs shock to centrosymmetric two positions, so the balance during clashing into is good,
And percussion tool 1 is difficult to rock during clashing into.It is separately positioned on owing to clashing into side surface
Protuberance both sides circumferentially, so being possible not only to during rotating forward carry out blasting operation, and
And blasting operation can be carried out during inverting, it is thus possible to realize wieldy percussion tool.
The most circumferentially clash into anvil 41 due to percussion hammer 41, and percussion hammer 41 will not clash into anvil axially forward
46, so tip end tool not necessarily promotes fastening main element, and when wood screw etc. is tight
Advantage is possessed when being affixed in timber.
It follows that the percussion hammer 41 shown in Fig. 8 and 9 and anvil 46 will be described with reference to Figure 10
Clash into operation.Basic operation is identical with the operation described in Fig. 7, and difference is hitting
It not a position but to perform to hit in the most axisymmetric two positions during hitting simultaneously
Hit.Figure 10 illustrates the sectional view of the A-A part of Fig. 3.Figure 10 illustrates from percussion hammer 41
Axially projecting protuberance 42 and 43 and the protuberance 47 and 48 axially projecting from anvil 46 it
Between position relationship.Anvil 47 direction of rotation (during rotating forward) during tightening operation is
Counterclockwise.
Figure 10 (1) is in percussion hammer 41 and is inverted to the shape of maximum backward position relative to anvil 46
State (is equivalent to the state of Fig. 7 (3)).Percussion hammer 41 from this state along the direction of arrow 91
(along forward) accelerates to clash into anvil 46.Then, it is similar to Figure 10 (2), protuberance 42
Through the outer circumferential side of protuberance 48, protuberance 43 is through the inner circumferential side of protuberance 47 simultaneously.
In order to allow two protuberances to pass through, make the internal diameter R of protuberance 42H2More than protuberance 48
External diameter RA1, therefore protuberance will not collide each other.Similarly, protuberance 43 is made
External diameter RH1Internal diameter R less than protuberance 47A2, therefore two protuberances will not be sent out each other
Raw collision.According to this position relationship, percussion hammer 41 and the relative rotation angle of anvil 46 can be made
Degree is more than 180 degree, it is ensured that the abundant reverse angle of percussion hammer 41 to anvil 46, and should
Reverse angle may be located at acceleration area before percussion hammer 41 clashes into anvil 46.
It follows that when percussion hammer 41 is just forwarding the state of Figure 10 (3) to, protuberance 42
Shock side surface 42a collides with the side surface 47a that is knocked of protuberance 47.Meanwhile,
The shock side surface 43a of protuberance 43 collides with the shock side surface 47a of protuberance 48.
By causing collision in two positions relative with rotation axis in this way, can perform relatively
Good shock is balanced in anvil 46.As the result of this shock, such as institute in Figure 10 (4)
Showing, anvil 46 rotates along the direction of arrow 94, and it is main to perform fastening by this rotation
The fastening of body component.Percussion hammer 41 has protuberance 42, and this protuberance is in radial concentric position
Put (higher than RH2And less than RH3Position) isolated excrescence, and there is protuberance
43, this protuberance is in concentric position (less than RH1Position) the 3rd isolated prominent
Body.Anvil 46 has protuberance 47, and this protuberance is in radial concentric position (higher than RA2
And less than RA3Position) isolated excrescence, and there is protuberance 48, this protuberance
It is in concentric position (less than RA1Position) isolated excrescence.
It follows that the driving method that percussion tool 1 related to the present embodiment will be described.?
In percussion tool 1 related to the present embodiment, anvil 46 and percussion hammer 41 are shaped to be less than
The anglec of rotation of 360 degree rotates against.Owing to percussion hammer 41 can not perform to rotate relative to anvil 46
More than a circle, so controlling of rotating is similarly unique.Figure 11 illustrates at percussion tool
Flop signal during 1 operation, driving signal, the rotating speed of motor 3 of inverter circuit
And percussion hammer 41 and the crash situation of anvil 46.In corresponding curve chart, horizontal axis is
Time (time of response curve figure is coupling).
In the percussion tool 1 related to the present embodiment, at the tightening operation of conflicting model
In the case of, perform fastening the most at a high speed, if be detected that required fastening
Moment of torsion becomes big, then perform fastening by switch to conflicting model (1), and if required
Tightening torque become big further, then perform fastening by switch to conflicting model (2).
At Figure 11 from time T1To time T2Drill mode under, control unit 51 is based on target
Revolution controls motor 3.Due to this reason, motor accelerates until motor 3 reaches arrow
Head target revolution shown in 85a.Hereafter, the rotating speed of motor 3 is due to from being attached to anvil
The big fastening counteracting force of the tip end tool of 46 and be gradually lowered as shown in arrow 85b.Cause
This, detect the reduction of rotating speed by the value being supplied to the electric current of motor 3, and time
Between T2Perform to be switched to rotate drive pattern by pulse mode (1).
This pulse mode (1) is such a pattern: wherein motor 3 is not by continuous driving
Move but be driven intermittently, and by pulsed drive so that being repeated several times and " stopping → rotate forward
Drive ".Wording " by pulsed drive " means to control to drive to be applied to inverter
The signal pulsation of circuit 52, makes to be supplied to the driving pulsation of current of motor 3, and
So that the revolution of motor 3 or output torque ripple.There is big cycle (example by repeating
As, about tens hertz to 100 hertz) drive electric current ON/OFF, such as from time
Between T2To time T21(termination) is supplied to the driving electric current of motor to be ON (driving),
From time T21To time T3The driving electric current of motor is ON (driving), from time T3
To time T31Driving electric current is OFF (termination), and from time T31To time T4Drive
Electric current is ON.Although for the control of revolution of motor 3 under the ON state driving electric current
System performs PWM control, but the cycle carrying out cycle and the Duty ratio control pulsed is (logical
Often for several KHz) compare sufficiently small.
In the example of fig. 11, stopping from T2Section preset time risen supplies to motor 3
After the revolution that should drive electric current and motor 3 is reduced to arrow 85b, control unit 51
Driving signal 83a is sent to control signal output circuit 53 by (seeing Fig. 5), thus to
The driving electric current (driving pulse) of motor 3 supply pulsation is so that motor 3 accelerates.?
This control during acceleration is not necessarily mean that and drives with the dutycycle of 100%, but meaning
With the Duty ratio control less than 100%.It follows that when percussion hammer 41 arrow 85c at and
Anvil 46 occurs to provide impact dynamic as shown in arrow 88a during strong collision.Move when providing to clash into
During power, terminate in section preset time and drive electric current, and motor to motor 3 supply
Rotating speed reduces as shown in arrow 85b again.Hereafter, control unit 51 will drive signal 83b
It is sent to control signal output circuit 53, so that motor 3 accelerates.Then, percussion hammer is worked as
41 provide shock dynamic as shown in arrow 88b when there is strong collision at arrow 85e with anvil 46
Power.Under pulse mode (1), it is upper that the repetition of motor 3 " stops → rotate forward to drive "
State intermittent driving to be repeated by one or many.If be detected that need higher tightening torque,
Then perform to be switched to rotate drive pattern by pulse mode (2).Can utilize such as when carrying
For during impact dynamic shown in arrow 88b motor 3 revolution (before arrow 85e or
Afterwards) determine a need for higher tightening torque.
It is driven intermittently although pulse mode (2) is motor 3 and is similar to pulse mode
Formula (1) is by the pattern of pulsed drive, but motor is actuated to cause " to stop → reversion driving
→ stop (stopping) → rotating forward driving " be repeated as many times as required.That is, in pulse mode (2)
Under, increase the reversion of motor 3 to not only increase the rotating forward driving of motor 3
Driving, percussion hammer 41 accelerates to invert fully relative to anvil 46 at percussion hammer 41 along forward direction
Angular relationship after there is strong collision with anvil 46.By driving percussion hammer 41 in this way,
Powerful tightening torque is produced in anvil 46.
In the example of fig. 11, when at time T4When execution is switched to pulse mode (2),
The driving of motor 3 is process is-then temporarily-suspended, then by being sent out by driving signal 84a along negative direction
Deliver to control signal output circuit 53 and make motor 3 invert.When performing forward or reverse,
The every of each switch element Q1 to Q6 is exported from control signal output circuit 53 by switching
The signal mode of individual driving signal (ON/OFF signal) realizes this forward or reverse.If
Motor 3 has inverted the given anglec of rotation, then the driving of motor 3 be process is-then temporarily-suspended with
Start to rotate forward and drive.Due to this reason, the driving signal 84b along forward is sent to control
Signal output apparatus 53.In the rotation utilizing inverter circuit 52 drives, drive signal not
It is switched to positive side or minus side.But, drive signal be divided into+direction and-direction and figure
Be schematically represented in 11 make it possible to will be readily understood that motor the most in any direction by
Rotate and drive.
Percussion hammer 41 when the rotating speed of motor 3 reaches maximal rate (arrow 86c) with anvil 46
Collide.Due to this collision, with produce under pulse mode (1) tightening torque (88a,
88b) compare tightening torque 89a that generation is significantly larger.When performing collision in this way,
The revolution of motor 3 reduces to reach arrow 86d from arrow 86c.It addition, can perform
Stop when detecting the collision shown in arrow 89a sending the control driving signal to motor 3.
In this case, if fastening main body is bolt, nut etc., then it is delivered to use after shock
The resilience of the hands at family is little.By the most also executing to motor 3 as in the present embodiment
Adding driving electric current, the counteracting force being applied to user is less than drill mode, and is suitable for medium
Operation under Fu Zai.Accordingly, it is capable to accelerate fastening speed, and with powerful pulse mode phase
Ratio can reduce power consumption.Hereafter, similarly, by with given number of times repeat " stop →
Reversion drives → stops (stopping) → rotating forward to drive " perform that there is powerful tightening torque
Fastening, and when user is at time T7Motor 3 is stopped completing during release trigger operation
Tightening operation.In addition to being discharged trigger operation by user, when computing unit 51 is based on shock
Impact detection sensor 56 (seeing Fig. 5) and judge complete the tightening torque with setting
Fastening time can stop motor 3.
As it has been described above, in the present embodiment, initially fasten rank only need little tightening torque
Perform in the drilling mode (s) to rotate in Duan to drive, when tightening torque becomes big by only rotating forward
Intermittent driving and under conflicting model (1), perform fastening, and logical in final secure stage
Cross the intermittent driving rotated and reverse by means of motor 3 and strong under conflicting model (2)
Perform fastening to strength.It addition, available conflicting model (1) and conflicting model (2) are held
Row cutting.Directly proceed to conflicting model (2) from drill mode and conflicting model (1) is not provided
Control be also possible.Owing in conflicting model (2), alternately operating motor is being just
Turn and reversion, so fastening speed becomes substantially slower than under drill mode or conflicting model (1).
When fasten speed the most unexpected slack-off time, be transitioned into clash into operation time sense of discomfort with
It is big that change compared by the percussion tool of the rotating percussion mechanism with routine.Therefore, from creeping into mould
When formula is transformed into conflicting model (2), operation sense becomes due to the intervention of conflicting model (1)
Become natural sense.Such as, by holding under drill mode or conflicting model (1) as much as possible
Row fastening, can shorten the tightening operation time.
It follows that the percussion tool relevant to this embodiment will be described referring to figs 12 to Figure 16
The control flow of 1.Figure 12 illustrates the control stream of the percussion tool 1 relevant to this embodiment
Journey.Percussion tool 1 judges the most whether user uses toggle switch 32 (ginseng
See Fig. 2) have selected conflicting model (step 101).If selected for conflicting model, then locate
Reason proceeds to step 102, and if non-selected conflicting model, that is, in normal drill mode
In the case of, process and proceed to step 110.
Under conflicting model, computing unit 51 judges whether trigger switch 8 is opened.As
Really trigger switch is opened (trigger operation portion 8a is pulled), as shown in Figure 11,
Then motor 3 starts (step 103) with drill mode, and according to trigger operation portion
The amount of pulling of 8a starts the PWM of inverter circuit 52 and controls (step 104).Then,
Being rotated in of motor 3 control is executed so that the peak point current being supplied to motor 3 will not
Accelerate while exceeding upper limit p.It follows that utilize current detection circuit 59 (seeing Fig. 5)
Output detections after self-starting plays t millisecond, be supplied to value I of electric current of motor 3.As
The current value I that detects of fruit not less than p1 ampere, then the processing returns to step 104, and such as
Really current value is more than p1 ampere, then process and proceed to step 108 (step 107).Connect down
Come, it is determined that whether the current value I detected is more than p2 ampere (step 108).
If current value I detected in step 108 is not less than p2 [A], that is, as
Fruit meets the relation of p 1 ＜ I ＜ p2, then performing the pulse mode (1) shown in Figure 14
The post processing of flow process proceeds to step 109 (step 120).Then, if detected electricity
Flow valuve I more than p2 [A], then processes and directly proceeds to step 109 and do not perform pulse mode (1)
Flow process.In step 109, it is determined that whether trigger switch 8 is set to ON.If
Trigger switch is closed, then the processing returns to step 101.If ON state continues, then exist
The processing returns to step 101 after performing the flow process of the pulse mode (2) shown in Figure 16.
If have selected drill mode in a step 101, then perform drill mode 110, but
The control of drill mode is identical with the control of step 102 to 107.Then, by immediately preceding
The control electric current in electric clutch is detected before the p1 that motor 3 is locked into step 107
Or over-current state, thus stop motor 3 (step 111), terminate drill mode, and
The processing returns to step 101.
The determination flow of the patten transformation in step 107 and 108 will be described with reference to Figure 13.On
Side curve chart shows the relation between the revolution of elapsed time and motor 3, and downside is bent
Line chart shows the current value being supplied to motor 3 and the relation between the time, and makes
Side is identical with the time shaft of lower curve figure.In left graph, when trigger switch exists
Time TAWhen being pulled (step 102 being equivalent to Figure 12), motor 3 starts and such as
Accelerate shown in arrow 113a.During this acceleration, perform to be restricted at maximum current value p
Constant current under the state of the value as shown in arrow 114a controls.Revolution when motor 3
When reaching given revolution (arrow 113b), the electric current during accelerating becomes such as arrow 114b
Shown usual electric current.Therefore, current value reduces.Hereafter, when receiving from secure component
When counteracting force carries out along with the fastening of screw, bolt etc. and increases, the revolution of motor 3
It is gradually reduced as shown in arrow 113c, and is supplied to the value of the electric current of motor to increase.So
After, starting from motor 3, after t millisecond, determine current value.If such as arrow
Meet relation p1 ＜ I ＜ p2 shown in 114c, then process and be transformed into the Pulse Width Control that hereinafter will describe
(1) control, as shown in step 120.
In right side graph figure, when trigger switch is at time TBIt is pulled and (is equivalent to figure
The step 102 of 12) time, motor 3 starts and accelerates as shown in arrow 115a.At this
During acceleration, perform to be restricted to the shape of value as shown in arrow 116a at maximum current value p
Constant current under state controls.When the revolution of motor 3 reaches given revolution (arrow 115b)
Time, the electric current during accelerating becomes the usual electric current as shown in arrow 116b.Therefore, electricity
Flow valuve reduces.Hereafter, when the counteracting force received from secure component is along with screw, bolt etc.
Fastening when carrying out and increase, the revolution of motor 3 is gradually reduced as shown in arrow 115c,
And the value being supplied to the electric current of motor increases.In this example, receive from secure component
Counteracting force increase rapidly.Therefore, as shown in arrow 116c, under the rotating speed of motor 3
Fall is big, and the rising degree of current value is big.Then, due to from motor 3 starting
As shown in arrow 116c, the relation of p2 ＜ I is met through the current value after t millisecond, so
Process the control being transformed into the pulse mode (2) shown in Figure 16 in step 140.
Generally, in the tightening operation of screw, bolt etc., due to screw or the processing of bolt
The change of precision, the fastening state of main element, material (such as, the plethora of timber, stricture of vagina
Reason etc.) change, tightening torque is the most constant.Therefore, can be only by creeping into mould
Formula performs fastening with certain stroke until and then having fastened.In this case,
When the fastening skipped under conflicting model (1) and to the higher drill mode of tightening torque (2)
Fastening when changing, tightening operation can be effectively completed at short notice.
It follows that the control of percussion tool under pulse mode (1) will be described in reference to Figure 14
Flow process.If processing and having been converted into pulse mode (1), then at the postpeak of given Abored Cycle
First value electric current is restricted to equal to or less than p3 ampere (step 121), and passes through
Section preset time (that is, T millisecond) rotates forward electric current to motor 3 supply and makes motor 3
Rotate (step 122).It follows that detection motor 3 is after elapsed time T millisecond
Rotating speed N1n[rpm] (n=1,2 ...) (step 123).It is supplied to electricity it follows that cut off
The driving electric current of motivation 3, and measure the revolution of motor 3 from N1nIt is reduced to N2n
(=N1n/ 2) the time t needed for1n.It follows that from t2n=X-t1nObtain t2n, at this t2n
Cycle during rotating forward electric current is applied to motor 3 (step 126), and by peak electricity
Stream suppression is equal to or less than p3 ampere, so that motor 3 accelerates.It follows that judge
The revolution N of motor 31(n+1)At elapsed time t2nThe most whether equal to or less than being used for changing
Critical revolutions R to pulse mode (2)th.If the revolution of motor equals to or less than Rth,
Then terminate the process of pulse mode (1), and process the step 120 returning Figure 12, and
If the revolution of motor equals or exceeds Rth, then the processing returns to step 124 (steps 128).
Figure 15 illustrates the relation between revolution and the elapsed time of motor 3 and is supplied to
The electric current of motor 3 and when performing the control flow shown in Figure 14 between elapsed time
Relation.First at time T, driving electric current 132 is supplied to motor 3.Owing to driving electricity
Peak point current is limited to equal to or less than p3 ampere, then limit as shown in arrow 132a by stream
System electric current during accelerating, hereafter, the current value such as arrow when the revolution of motor 3 increases
Reduce shown in head 132b.At time T1, when the revolution measuring motor 3 has reached N11
Time, by calculating from N21=N11/ 2 calculate the revolution N that motor 3 starts to rotate21.Example
As, revolution N11For 10,000rpm.When the revolution of motor 3 is reduced to N21Time, supply
Drive electric current 133, and motor 3 again speeds up.Pass through t2n=X-t1nDetermine that applying is driven
The time t of streaming current 1332n.Similarly, although perform identical control at time 2X with 3X
System, but the rising degree of the revolution of motor 3 becomes big along with fastening counteracting force and reduces,
And revolution N14To become equal to or less than critical rotational value R at time 4Xth.Now,
The process of pulse mode (1) terminates, and processes the process being transformed into pulse mode (2).
It follows that percussion tool control under pulse mode (2) will be described with reference to Figure 16
Flow process.First, cut off the driving electric current being supplied to motor 3, and perform standby 5 millis
Second (step 141).It follows that reverse current is supplied to motor 3 to make motor
(step 142) is rotated with-3000rpm." bear " mean to make motor 3 with operation
Time the contrary direction of direction of rotation on rotate with 3000rpm.If it follows that motor
The revolution of 3 has reached-3000rpm, then cut off the electric current being supplied to motor 3, and hold
Standby 5 milliseconds (step 143) of row.Perform the reason of standby 5 milliseconds to be when make motor
3 exist, when inverting the most in reverse direction, the probability that the main body of percussion tool may be rocked.This
Outward, also as in this standby period not power consumption, therefore can realize energy-conservation.It follows that connect
Logical rotating forward electric current is to make motor 3 rotate (step 144) along forward direction.Just connecting
95 milliseconds of the electric current being supplied to motor 3 is cut off after turning electric current.But, when at this electric current
Before Bei Qieduan percussion hammer 41 and anvil 46 collide (shock) time, product in tip end tool
Raw powerful tightening torque.Hereafter, whether detection triggers switch is maintained for ON state.
If trigger switch is in OFF state, then stop the rotation of motor 3, terminate pulse
The process of pattern (2), and process the step 140 (step 147 and 148) returning Figure 12.
In step 147, if trigger switch 8 is in ON state, then the processing returns to step
141 (steps 147).
As it has been described above, according to the present embodiment, by utilizing percussion hammer and anvil (phase therebetween
The anglec of rotation is less than a circle) perform motor to rotate continuously, only along the interval rotation of forward
Turn and along forward with along reverse intermittent rotary, secure component can be effectively tightened.Additionally,
Owing to percussion hammer and anvil can be manufactured into simple structure, so the miniaturization of percussion tool can be realized
Reduce with cost.
Although the most describe the present invention based on shown embodiment, but the present invention
It is not limited to above-described embodiment and can be in the case of without departing from the spirit or scope of the present invention
Carry out various change.Such as, in the present embodiment motor is illustrated as brushless DC
Motor, but the invention is not limited in this, and can use can be along forward with along reversely quilt
The other type of motor driven.
Additionally, the shape of anvil and percussion hammer is arbitrary.Only need provide anvil can not be relative with percussion hammer
In the structure rotating (can not rotate when self is overlapping) the most continuously, it is ensured that be less than
The given relative rotation angle of 360 degree, and form shock side surface and be knocked side surface.
Such as, the protuberance of percussion hammer and anvil may be configured to is not axially projecting but circumferentially highlights.
Additionally, due to the protuberance of percussion hammer and anvil is the most protruding and is only capable of with given
Shape is formed clashes into side surface and is knocked the protuberance of side surface, so protuberance can be
To the internal prominent protuberance of percussion hammer or anvil (that is, recess).Clash into side surface and hit
Hit side surface and need not be confined to flat surface, and can also be to be formed to clash into side surface or quilt
Clash into curved shape or other shape of side surface.
Hereinafter, with reference to Figure 17 to 29, electronic pulse driver 1001 will be described, should
Electronic pulse driver illustrates as the power tool relevant to an embodiment.In Figure 17
Shown electronic pulse driver 1001 includes housing 1002, motor 1003, percussion hammer portion
1004, anvil 1005 and switching mechanism 1006.Housing 1002 is formed from a resin, and forms electricity
The shell of subpulse driver 1001, and include generally tubular stem portion 1021 and from master
The handle portion 1022 that cadre extends.
As shown in Figure 17, in stem portion 1021, motor 1003 is arranged to motor
The longitudinal direction of 1003 is with the most consistent, and percussion hammer portion 1004 and anvil 1005 are towards motor 1003
The alignment of axial end.In the following description, axially in parallel by with motor 1003
Direction is defined as front-rear direction, wherein will be from motor 1003 towards percussion hammer portion 1004 and anvil
The direction in portion 1006 is defined as front side.It addition, previous-next direction is defined as handle portion 1022
The direction extended on the downside of stem portion 1021, and by the direction definition orthogonal with front-rear direction
For L-R direction.
The percussion hammer shell 1023 that percussion hammer portion 1004 and anvil 1005 are disposed therein is arranged in master
Before in cadre 1021-side position.Percussion hammer shell 1023 is made of metal, substantially in funnel
Shape (diameter is along with it anteriorly extends and tapers into), and it is arranged to infundibulate top
End face forward side.The leading section of percussion hammer shell is formed with out 1023a, the top that hereinafter will describe
Ending tool installation portion 1051 is projected into front side through this opening, and supports anvil 1005
Metalwork 1023A is rotatably arranged at the inwall limiting out 1023a.
In stem portion 1021, lamp 1002A be maintained at out position near 1023a and
The lower position of percussion hammer shell 1023.Lamp 1002A is configured to when the drill bit as tip end tool
(not shown) is installed in energy time on tip end tool installation portion 1051 (being described further below)
Enough irradiate around the front end of drill bit.It addition, in stem portion 1021, dialling as switching part
Sheet 1002B is arranged in the lower position of lamp 1002A in the way of rotatable operation.Due to lamp
The structure that 1002A is kept by stem portion 1021, it is not necessary to holding lamp is provided separately especially
The parts of 1002A, and simple structure can be used reliably to keep lamp 1002A.It addition,
Lamp 1002A and plectrum 1002B be disposed generally on respectively stem portion 1021 along L-R direction
Centre position.It addition, stem portion 1021 is formed with air entry and air vent (not shown),
By hereinafter the fan 1032 of description being drawn ambient air into through described air entry and air vent
Stem portion 1021 or discharge from stem portion 1021.
Handle portion 1022 is prolonged towards downside along front-rear direction from the centre position of stem portion 1021
Stretch, and be integrally formed with stem portion 1021.Switching mechanism 1006 is arranged on handle portion 1022
Inner side, and it is removably mounted in this to the battery 1024 of motor 1003 power supply
The apical position along bearing of trend of switching mechanism.In handle portion 1022, by operative
Trigger 1025 be arranged at the root of stem portion 1021 before-side position.It addition, arrange
The position of trigger 1025 is the position near plectrum 1002B below aforementioned plectrum 1002B
Put.Accordingly, it is capable to use a finger to operate trigger 1025 and plectrum 1002B respectively.Separately
Outward, can switch hereinafter by the drill mode described, clutch by rotating plectrum 1002B
Pattern and pulse mode.
Display unit 1026 is arranged in the top on rear side of stem portion 1021.Display unit 1026
The mould selected in drill mode, clutch mode and pulse mode that display hereinafter will describe
Formula.
As shown in Figure 17, motor 1003 is the rotor including having output shaft 1031
The brushless motor of 1003A and the stator 1003B being arranged in the position towards rotor 1003A,
And make the axial of output shaft 1031 and front-rear direction one in being arranged in stem portion 1021
Cause.Output shaft 1031 highlights forward or backward from rotor 1003A, and its extrusion position
Rotatably it is bearing in stem portion 1021 by bearing.In output shaft 1031,
The fan 1032 coaxially and integrally rotated with output shaft 1031 is arranged on output shaft and dashes forward
Go out the position to front side.Little gear 1031A is arranged in output shaft and is projected into the position of front side
Foremost position in putting coaxially and integrally rotates with output shaft 1031.
Percussion hammer portion 1004 includes gear mechanism 1041 and percussion hammer 1042, and is arranged to hitting
The front side of motor 1003 it is arranged in hammer shell 1023.Gear mechanism 1041 includes sharing
Two planetary gears 1041B and 1041C of one external gear 1041A.External gear
1041A is arranged in percussion hammer shell 1023, and is fixed in stem portion 1021.One
Individual planetary gears 1041B be arranged in external gear 1041A in case with external gear 1041A
Engagement, and use little gear 1031A as sun gear.Another planetary gears
1041C be arranged in external gear one planetary gears 1041B front side so that
Engage with external gear 1041A, and use that one planetary gears 1041B's is defeated
Shaft is as sun gear.
Percussion hammer 1042 is limited at the front surface of the planet carrier of planetary gears 1041C
On, and have side forward prominent and be arranged in the row of planetary gears 1041C
First copulational protuberance 1042A of the position of the center of rotation deviation of star bracket, and cross over row
The center of rotation of the planet carrier of star gear mechanism 1041C (Figure 19) and the first copulational protuberance
The second copulational protuberance 1042B that 1042A relatively positions.
Anvil 1005 includes tip end tool installation portion 1051 and anvil 1042, and is arranged in and hits
Before hammer portion 1004.Tip end tool installation portion 1051 composition cylindrical in shape, and via metalwork
1023A is rotatably supported in the opening 1023a of percussion hammer shell 1023.It addition,
Tip end tool installation portion 1051 has and creeps into towards rear end from front end and allow drill bit (not show
Go out) the boring 1051a that is inserted, and have drill bit (not shown) is maintained at front end
The chuck 1051A in portion.
Anvil 1052 and tip end tool installation portion 1051 are integrally formed so that at percussion hammer shell 1023
Before being inside positioned at tip end tool installation portion 1051, and have prominent towards rear side and arrange
It is engaged prominent in the first of the position deviateed with the center of rotation of tip end tool installation portion 1051
Play 1052A, and the center of rotation and first crossing over tip end tool installation portion 1051 is engaged
What projection relatively positioned second is engaged projection 1052B.When percussion hammer 1042 rotates, the
One copulational protuberance 1042A and first is engaged projection 1052A and collides each other, meanwhile,
When the second copulational protuberance 1042B and second be engaged projection 1052B collide each other time,
The moment of torsion of percussion hammer 1042 is passed to anvil 1052.Operation in detail hereinafter will be described.
Switching mechanism 1006 includes plate 1061, trigger switch 1062, switchboard 1063 and
Connect the circuit of these parts.It is attached that plate 1061 is arranged in battery 1024 in handle portion 1022
Near position, is connected to battery 1024, and be connected to lamp 1002A, plectrum 1002B,
Trigger switch 1062, switchboard 1063 and display unit 1026.
It follows that reference Figure 18 to be described the structure of the driving control system of motor 1003.
In the present embodiment, motor 1003 includes three-phase brushless DC motor.This is brushless DC
The rotor 1003A of motor includes having many groups of (being two groups in the present embodiment) N-S poles
Permanent magnet, and stator 1003B include use star connection threephase stator line U, V
And W.In order to detect the position of rotation of rotor 1003A, position of rotation detecting element (Hall
Element) 1064 the most such as arrange every 60 degree of angles along the circumference of rotor 1003A
On plate 1061.Based on the position detection signal from position of rotation detecting element 1064,
Control energising direction and the time of stator winding U, V and W, and motor 1003 rotates.
Position of rotation detecting element 1064 is arranged on towards rotor 1003A's on switchboard 1063
The position of permanent magnet 1003C.
The element being loaded in the electronics on switchboard 1063 includes connecting with the form of three-phase bridge
Six switch element Q1001 to Q1006, such as FET.Six switch elements of bridge joint
The respective gates of Q1001 to Q1006 is connected to the control signal output being loaded on plate 1061
Circuit 1065, and the respective drain of six switch element Q1001 to Q1006 or respective sources
Pole is connected to use stator winding U, V and W of star connection.Thus, six switch units
Part Q1001 to Q1006 is by the switch element from control signal output circuit 1065 input
Signal (driving signal, such as H4, H5 and H6) is driven to perform handover operation, and
Power to stator winding U, V and W, be wherein applied to the battery of inverter circuit 1066
The DC voltage of 1024 is three-phase voltage (U phase, V phase and W phase) Vu, Vv, Vw.
Switch element in the respective gates driving six switch element Q1001 to Q1006 drives
In the middle of dynamic signal (three-phase signal), will be used for three negative electricity source switch element Q1004,
The driving signal of Q1005 and Q1006 is as pulse width modulating signal (pwm signal)
H4, H5 and H6 supply, and the pulse width (dutycycle) of pwm signal is by loading
Computing unit 1067 operational ton based on trigger 1025 (stroke) on plate 1061
Detecting signal and change, thereby regulation is supplied to the amount of power of motor 1003 and controls electricity
The starting/stopping of motivation 1003 and rotating speed.
Here, the positive electrical source that pwm signal is supplied to inverter circuit 1066 switchs
Element Q1001 to Q1003 or negative electricity source switch element Q1004 to Q1006, and
By high speed COMS bus exchange switch element Q1001 to Q1003 or switch element Q1004 to Q1006
Control to be supplied to the electric power of stator winding U, V and W from the DC voltage of battery 1024.
It addition, pwm signal to be supplied to negative electricity source switch element Q1004 to Q1006.
Accordingly, it is capable to controlled the rotating speed of motor 1003 by the pulse width controlling pwm signal,
Thus regulation is to be supplied to the electric power of each stator winding U, V and W.
Control unit 1072 is arranged on plate 1061, and has control signal output circuit
1065, computing unit 1067, current detection circuit 1071, handover operation testing circuit 1076,
Apply voltage setting circuit 1070, direction of rotation initialization circuit 1068, rotor-position detection electricity
Road 1069, revolution detecting circuit 1075 and impact testing circuit 1074.Computing unit
1067 include the CPU for carrying out output drive signal based on processing routine and data
(CPU), for storage processing program or the ROM of control data and store for interim
The RAM of data, timer etc., but not shown.Computing unit 1067 is formed based on rotation
Turn the alternating output signal ground of direction setting circuit 1068 and rotor position detection circuit 1069
The driving signal of switching predetermined switch element Q1001 to Q1006, and by this control signal
Output is to control signal output circuit 1065.This alternately makes stator winding U, V and W's
Predetermined winding wire is energized, and makes rotor 1003A rotate along the direction of rotation set.This
In the case of, it is applied to negative pole based on the output control signal applying voltage setting circuit 1070
The driving signal of source-side switches element Q1004 to Q1006 is defeated as PWM modulation signal
Go out.The value of the electric current being applied to motor 1003 is measured by current detection circuit 1071, and
And the driving electricity of setting it is adjusted to become when the value of electric current is fed back to computing unit 1067
Power.It addition, pwm signal can be applied to positive electrical source switch element Q1001 to Q1003.
Electronic pulse driver 1001 is provided with the direction of rotation for switching motor 1003
Forwards/reverse changer lever (not shown).As long as direction of rotation initialization circuit 1068 detects
The change of forwards/reverse changer lever (not shown), the rotation of this bar just switching motor 1003
Direction is to be delivered to computing unit 1067 by its control signal.Produce in detection anvil 1052 rushes
The impact detection sensor 1073 of the size hit is connected to control unit 1072, and its
Output is input to computing unit 1067 via impact testing circuit 1074.
Figure 19 is the sectional view as viewed from the direction III from Figure 17, and illustrates at electronics
Position relationship between percussion hammer 1042 and anvil 1052 during pulse driver 1001 operation.Figure
19 (1) show that the first copulational protuberance 1042A and first is engaged projection 1052A each other
Contact and the second copulational protuberance 1042B and second is engaged projection 1052B each other simultaneously
The state contacted.The external diameter RH3 and first of the first copulational protuberance 1042A is engaged projection
The external diameter RA3 of 1052A is formed as being equal to each other.Percussion hammer 1042 from this state along Figure 19's
It is rotated clockwise, and enters the state shown in Figure 19 (2).Owing to first engages
The internal diameter RH2 of projection 1042A is formed larger than the second external diameter being engaged projection 1052B
RA1, thus the first copulational protuberance 1042A and second be engaged projection 1052B will not be each other
Contact.Similarly, it is formed as less than due to the external diameter RH1 of the second copulational protuberance 1042B
The first internal diameter RA2 being engaged projection 1052A, so the second copulational protuberance 1042B and
One is engaged projection 1052A will not be contacting one another.Then, figure is rotated to when percussion hammer 1042
During position shown in 19 (3), motor 1003 starts reversion, and percussion hammer 1042 edge
Counterclockwise rotate.Position shown in Figure 19 (3), percussion hammer 1042 enters percussion hammer
1042 states being inverted to maximum reverse position relative to anvil 1052.By motor 1003
Rotating forward, percussion hammer 1042 is via institute in the state such as Figure 19 (5) shown in Figure 19 (4)
Show that operation makes the first copulational protuberance 1042A and first be engaged projection 1052A and occurs each other
Collision, and the second copulational protuberance 1042B and second is engaged projection 1052B each other simultaneously
Collide.By impact during this collision, as shown in Figure 19 (6), anvil 1052
Rotate in the counterclockwise direction.
As it has been described above, be arranged on percussion hammer 1042 two copulational protuberances are about axial rotary
Centrosymmetric position collides with two copulational protuberances being arranged on anvil 1052.At this
Plant under structure, stabilize balance during shock, and it is electric that workman can be made to be difficult to when clashing into
Subpulse driver 1001 is rocked.
Further, since the internal diameter RH2 of the first copulational protuberance 1042A is formed larger than the second quilt
The external diameter RA1 of copulational protuberance 1052B, and the external diameter RH1 of the second copulational protuberance 1042B
It is formed as less than the first internal diameter RA2 being engaged projection 1052A, so percussion hammer 1042 can be made
And the relative rotation angle between anvil 1052 is more than 180 degree.Thus, can guarantee that percussion hammer 1042
Sufficient opposing angular and acceleration distance relative to anvil 1052.
It addition, the first copulational protuberance 1042A and the second copulational protuberance 1042B can be along week
To two ends be engaged raised 1052A and second with first and be engaged raised 1052B and touch
Hit.Therefore, it is possible not only to during rotating forward and blasting operation can be carried out during inverting.
It is, therefore, possible to provide wieldy percussion tool.It addition, when anvil 1052 is by percussion hammer 1042
During shock, anvil 1052 was not knocked on axially (forward).It is therefore prevented that top work
Tool is compressed against on the parts of pending operation, and when being fastened in timber by wood screw, this is
One advantage.
It follows that drive describing the electronic impulse according to the present embodiment referring to figures 20 through 25
Device can use operator scheme.Electronic pulse driver according to the present embodiment has three kinds of behaviour
Operation mode, including drill mode, clutch mode and pulse mode.
Drill mode is percussion hammer 1042 and the integrally rotated pattern of anvil 1052, and mainly uses
In the case of fastening wood screw.As shown in Figure 20, the electric current of inflow motor 1003
Carry out along with fastening and increase.
As illustrated in figures 21 and 22, clutch mode is that the driving of motor 1003 is in inflow
The electric current of motor 1003 increases to target along with percussion hammer 1042 and anvil 1052 integral-rotation
The pattern stopped in the case of value (target torque), and be mainly used in entering with accurate torque
The material circumstance of row fastening, such as, fasten the most visible securing member
Situation.Although it addition, describe later, but under clutch mode, motor 1003
Reversion is to produce false clutch, and when fastening wood screw, motor 1003 invert with
Just screw loosening (seeing Figure 22) is prevented.
Figure 23 to the pulse mode as shown in 25 be motor 1003 rotate and reverse friendship
For switching and inflow motor 1003 electric current along with percussion hammer 1042 and anvil 1042 overall
Rotate and carry out securable fastener by shock in the case of increasing to predetermined value (preset torque)
Pattern, and be mainly used in such as the most sightless position of screw fasten long spiro nail
Situation.Thus, can supply strong tightening torque, and can reduce simultaneously from treat into
The repulsive force of the parts of row operation.
It follows that make describing when the electronic pulse driver according to the present embodiment performs fastening
The control that during industry, control unit 1072 is carried out.Further, since be not carried out relevant to drill mode
Special control, so the descriptions thereof are omitted.It addition, in the following description, based on electric current
Judgement in do not consider starting current.It addition, the most do not consider the electric current when applying to rotate forward electric current
The unexpected increase of value.This is because such as when applying if Figure 22 is to the rotating forward electricity as shown in 25
During stream, screw or bolt are fastened inoperative by increasing suddenly of current value.By providing such as
The dead time of about 20ms, it may not be necessary to consider this unexpected increase of current value.
First, will describe with reference to Figure 21,22 and 26 operator scheme will be set as clutch mould
The situation of formula.
Figure 21 illustrate when fasten under clutch mode such as bolt etc securing member (under
Literary composition be referred to as bolt) time control, Figure 22 illustrate when fasten under clutch mode such as wood
Control during securing member (the hereinafter referred to as wood screw) of screw etc, and Figure 26 be when
Flow chart during securable fastener under clutch mode.
Under the clutch mode according to the present embodiment, by pulling trigger to start Figure 26
Flow chart, and by having increased to target current value at the electric current of inflow motor 1003
Judge to reach target torque to complete terminal operation in the case of T (seeing Figure 21 and 22).
When trigger when pulled, control unit 1072 first apply for and motor 1003
The reversal voltage coordinated, so that percussion hammer 1042 inverts so that percussion hammer and anvil 1052 occur gently
Micro-collision (t of Figure 21 and 221, and the S1601 of Figure 26).In the present embodiment,
The reversal voltage being used for coordinating is set as 5.5V, and the reversal voltage being used for coordinating is executed
Adding the time is set as 200ms.This can reliably make securing member and tip end tool be fitted to each other.
When trigger the most when pulled, there is percussion hammer 1042 and anvil 1052 probability separated from one another.
In this condition, when electric current inflow motor 1003, clash into and applied by percussion hammer 1042
To anvil 1052.Meanwhile, clutch mode is such a pattern: wherein motor 1003
Drive the electric current at inflow motor 1003 along with percussion hammer 1042 and anvil 1052 integral-rotation
Stop in the case of increasing to desired value (target torque).In this case, when can be to anvil
When 1052 applyings are clashed into, only by shock, the moment of torsion exceeding desired value can be supplied to fastening
Part.Particularly tight when the enhancing performing the screw fastened or like are fastened again
Gu time, this problem becomes apparent.
Therefore, under clutch mode, after S1601, will use during the period 1
It is applied to motor 1003 in the pre-rotating forward voltage started, so that percussion hammer 1042 and anvil 1052
Contact and do not make anvil 1052 rotate (starting in advance) (t of Figure 21 and 222, and Figure 26
S1602).In the present embodiment, the rotating forward voltage being used for pre-starting is set as 1.5V,
And the rotating forward voltage application time being used for pre-starting is set as 800ms.It addition, at this
In embodiment, there is percussion hammer 1042 and the probability of about 315 degree separated from one another of anvil 1052.
Therefore, it is set as the period 1 rotating forward the electronic of voltage by apply to be used for pre-starting
The cycle that machine 1003 makes percussion hammer 1042 rotate 315 degree and expends.
Subsequently, the rotating forward voltage being used for securable fastener is applied to motor 1003 (Figure 21
With 22 t3, and the S1603 of Figure 26), and judge the electricity of inflow motor 1003
Whether stream becomes greater than threshold value a (S1604).In the present embodiment, fastening will be used for just
Turn voltage and be set as 14.4V, and threshold value a is that fastening in the range of screw loosening is not occurring
Current value in the terminal stage of wood screw, and it is set as 15A in the present embodiment.
If the electric current of inflow motor 1003 more than threshold value a (t4 of Figure 21 and Figure 22,
And the S1604 of Figure 26: yes), then whether the increment rate of Cutoff current is more than threshold value b
(S1605).Such as, situation as shown in figure 21, can be according to (A (Tr+t)-A (Tr))/A (Tr)
Carry out the increment rate of calculating current.T represents from specific time point Tr elapsed time.It addition, such as
Situation shown in Figure 22, can carry out the increase of calculating current according to (A (N+1)-A (N))/A (N)
Rate.The maximum of electric current when N is to load specific rotating forward electric current, and N+1 be load described
The maximum of electric current when the next one of specific rotating forward electric current rotates forward electric current.Such as, Figure 22's
In situation, threshold value b of (A (N+1)-A (N))/A (N) is set as 20%.
If it is said that in general, fastening bolt, the most as shown in Figure 21, inflow motor 1003
Electric current increase suddenly in final secure stage.On the contrary, in the case of fastening wood screw,
As shown in Figure 22, electric current increases gently.
Therefore, if the increasing of electric current when the electric current of inflow motor 1003 becomes greater than threshold value a
Add rate more than threshold value b, then control unit 1072 judge securing member as bolt, and if increased
Add rate and equal to or less than threshold value b, then judge that securing member is as wood screw.
It is without the concern for spiral shell in the increment rate of electric current more than the securing member in the case of threshold value b
The bolt that nail loosens.Therefore, target current value T (figure is had increased to subsequently when the value of electric current
The t5 of 21, and the S1606 of Figure 26: yes) time, stop supplying moment of torsion to bolt.But,
As it has been described above, electric current increases suddenly in the case of bolt.Accordingly, there exist moment of torsion merely due to
Stop applying to rotate forward voltage and be applied to the probability of bolt by inertia force.Therefore, at this
In embodiment, the reversal voltage being used for braking is applied to motor 1003 to stop to spiral shell
Bolt supply moment of torsion (t5 of Figure 21, and the S1607 of Figure 26).In the present embodiment, will
Reversal voltage application time for braking is set as 5ms.
Subsequently, the rotating forward voltage and reversal voltage that are used for false clutch are alternately applied to electricity
Motivation 1003 (t7 of Figure 21 and 22, and the S1608 of Figure 26).In the present embodiment,
The rotating forward voltage and reversal voltage application time that are used for false clutch are set as 1000ms (1
Second).Here, false clutch means when obtaining required torsion along with reaching predetermined current value
During square, it is provided that remind the function of this event to workman.Although it is actual from the output of motor
On be not affected by loss, but provide with virtual mode provide motor output suffer a loss remind
Alerting pattern.
When applying for the reversal voltage of false clutch, percussion hammer 1042 separates with anvil 1052,
And when applying for the rotating forward voltage of false clutch, percussion hammer 1042 clashes into anvil 1052.So
And, owing to the rotating forward voltage and reversal voltage that are used for false clutch are set so that fastening force
It is not applied to the voltage (such as 2V) of securing member, so false clutch only produces strike note
Sound.By producing this false clutch, user is capable of identify that fastening terminates.
On the other hand, due to tight in the case of equaling to or less than threshold value b in the increment rate of electric current
Firmware is the wood screw needing to consider screw loosening, so subsequently relative to the electricity for fastening
The reversal voltage being used for screw loosening is applied to motor 1003 (Figure 22 by pressure at a predetermined interval
T5, and the S1609a of Figure 26).Screw loosening is it is meant that work as and be arranged on wood screw
Between cross depressed part and the cross lobe of tip end tool (drill bit) in head of screw
Cooperation when being released, the cross lobe of tip end tool will be uneven by cross depressed part
Block weighing apparatus, and cross depressed part will subside.It is used for the anti-of screw loosening by applying
Turning voltage makes anvil invert.By the reversion of this anvil, it is attached to the cross of the tip end tool of anvil
The cross depressed part cooperation firmly with each other of lobe and wood screw.It addition, for screw
The reversal voltage loosened is not intended to increase and is applied to anvil 1052 by clashing into from percussion hammer 1042
Acceleration distance, but be used for making reverse torque from anvil 1052 to be to a certain degree applied to screw,
Reversion is made to be applied to anvil 1052 from percussion hammer 1042.In the present embodiment, screw pine will be used for
Dynamic reversal voltage is set as the voltage of 14.4V.
Then, (t6 of Figure 22, Yi Jitu when electric current has increased to target current value T
The S1610a of 26: yes), the rotating forward voltage of false clutch and reversal voltage will be used for (hereafter
It is referred to as the voltage for false clutch) it is alternately applied to motor 1003, produce false clutch
Device (t7 of Figure 22, and the S1608 of Figure 26), and remind user to fasten to terminate.
Finally, for being applied to from the electricity applied for false clutch of voltage of false clutch
Pressure stops (S1610) after the scheduled time (S1609: yes).
It follows that will describe with reference to Figure 23 to 25 and Figure 27, operator scheme is set as pulse
The situation of pattern.
Figure 23 illustrates the control when fastening bolt in the pulsing mode, and Figure 24 illustrates
When fastening wood screw in the pulsing mode be not carried out hereinafter by describe be transformed into the second arteries and veins
Control in the case of punch die formula, Figure 25 illustrates when fastening wood screw in the pulsing mode
The control being transformed in the case of the second pulse mode that literary composition will describe after execution, and scheme
27 is the flow chart when securable fastener in the pulsing mode.
It addition, be similar to clutch mode, the flow chart of Figure 27 is opened also by pulling trigger
Begin.
When trigger when pulled, control unit 1072 be first similar to clutch mode apply
For the reversal voltage (t of Figure 23 to 25 coordinated with motor 10031, and Figure 27
S 1701).On the other hand, in the pulsing mode, carry out fastening not weighing with accurate torque
Want.Therefore, the step of the S1602 (starting in advance) be equivalent under clutch mode is eliminated.
It follows that apply rotating forward voltage for the fastening (figure identical with under clutch mode
The t of 23 to 252, and the S1702 of Figure 27), and judge inflow motor 1003
Electric current has become greater than threshold value c (S1703) the most.
Here, in the case of wood screw, load (electric current) starts to be gradually increased from fastening.
On the contrary, in the case of bolt, it is supported on when fastening starts and the most slightly increases, and when tight
Admittedly increase suddenly when having progressed to a certain degree.When applying load in the case of bolt,
From the counteracting force of the fastener receiver manufactured in pairs become greater than in the case of wood screw from
The counteracting force that the parts of pending operation receive.Therefore, in the situation of bolt, from one-tenth
To the fastener receiver manufactured for assisting the power of reversal voltage.Therefore, fasten when will be used for
When the reversal voltage of part is applied to motor 1003, absolute value is less than in the case of wood screw
Reverse current inflow motor 1003.In the present embodiment, will load in the case of bolt
The electric current (such as 15A) near starting point increased is set as threshold value c.
If the electric current of inflow motor 1003 has become greater than threshold value c, then will be used for fastening
The reversal voltage that part is distinguished is applied to the motor 1003 (t of Figure 23 to 253, and Figure 27
S1704).By be used for securing member distinguish reversal voltage be set so that will not by clash into from
Percussion hammer 1042 is applied to the such value of anvil 1052 (such as 14.4V).
Then, control unit 1072 judges when applying for the reversal voltage that securing member is distinguished
Whether the absolute value of the electric current of inflow motor 1003 is more than threshold value d (S1705), if should
Absolute value is more than threshold value d, then distinguish wood screw and fastened (Figure 24 and 25), and such as
Really this absolute value equals to or less than threshold value d, then distinguish bolt and fastened (Figure 23), and
And control motor 1003 to perform to clash into fastening according to the securing member distinguished.?
In the present embodiment, threshold value d is set as 20A.
Specifically, by rotating forward voltage and reversal voltage are alternately applied to motor
1003 perform to clash into fastening.But, in the present embodiment, voltage and reversion electricity will be rotated forward
Pressure is alternately applied to motor 1003 and makes the cycle applying reversal voltage (the most anti-
The turn-week phase) and apply the ratio rotating forward the cycle (hereinafter referred to as rotating forward the cycle) of voltage with negative
The size carried increases in proportion to.
It addition, carried out in the case of fastening becomes difficulty by compression, usually it is transformed into logical
Cross shock to fasten.But, from the viewpoint of user's comfortableness, preferably it is gradually carried out this
Conversion.Therefore, in the present embodiment, perform to concentrate in compression under the first pulse mode
Shock fastening, and under the second pulse mode perform concentrate on shock shock fastening.
Specifically, under the first pulse mode, during the long rotating forward cycle, thrust is supplied
Securing member should be given.On the other hand, under the second pulse mode, returing cycle becomes along with load
Lengthen greatly and gradually, simultaneously to the rotating forward cycle supply impact dynamic being gradually shortened.It addition,
In the present embodiment, under the first pulse mode, in order to reduce the portion from pending operation
The counteracting force of part, along with load becomes big, the rotating forward cycle is gradually shortened and returing cycle keeps
Constant.
Return the flow chart of Figure 27, description is switched to the first pulse mode and the second pulse mode
Formula.
First, the absolute value of the electric current of inflow motor 1003 will be described in more than threshold value d
(that is, in the case of fastening wood screw), it is transformed into first in the case of (S1705: yes)
Pulse mode and the second pulse mode.
In this case, first the voltage being used for the first pulse mode executed by control unit 1072
It is added to motor 1003, fastens (Figure 24's and 25 with the shock performing to concentrate in compression
T5, and the S1706a to S1706c of Figure 27).Specifically, will be equivalent in one group
Only (5ms) → reversal voltage (15ms) → termination (5ms) → rotating forward voltage (300ms)
It is applied to motor 1003 (S1706a).After a predetermined time, will be equivalent to one
Group stops (5ms) → reversal voltage (15ms) → termination (5ms) → rotating forward voltage (200ms)
It is applied to motor 1003 (S1706b).Additionally, after a predetermined time, by phase
When in one group of termination (5ms) → reversal voltage (15ms) → termination (5ms) → rotating forward electricity
Pressure (100ms) is applied to motor 1003 (S1706c).
Subsequently, control unit 1072 judges the stream when applying for the voltage of the first pulse mode
Whether enter the electric current of motor 1003 more than threshold value e (S1707).Threshold value e is arranged to distinguish
Whether should perform to be transformed into the second pulse mode, and be set as 75A in the present embodiment.
If flow into electronic when applying for voltage (the rotating forward voltage) of the first pulse mode
The electric current of machine 1003 equals to or less than threshold value e (S1707: no), then repeat S1706a extremely
S1707c and S1707.As long as it addition, applying the number of times of the voltage for the first pulse mode
Increasing, load just becomes big, and big from the counteracting force change of the parts of pending operation.
Therefore, in order to reduce the counteracting force of the parts from pending operation, apply for first
The voltage of pulse mode makes the rotating forward cycle gradually contract while returing cycle holding is constant
Short.In the present embodiment, cycle set will be rotated forward to become to shorten, such as
300ms→200ms→100ms。
On the other hand, if when applying the voltage (rotating forward voltage) for the first pulse mode
Time inflow motor 1003 electric current more than threshold value e (t6 of Figure 24 and 25, and Figure 27
S1707: yes), first judge for the voltage (rotating forward voltage) of the first pulse mode
Whether the increment rate of the electric current caused is more than threshold value f (S1708).Threshold value f is arranged to distinguish
Whether wood screw is screwed into place, and set in the present embodiment on the parts of pending operation
It is 4%.
If the increment rate of electric current is more than threshold value f (S1708 of Figure 24 and 27: yes), then
It is considered as wood screw being screwed into place on the parts of pending operation.Therefore, in order to reduce with
After counteracting force, the voltage being used for putting in place is applied to the motor 1003 (t of Figure 2411,
And the S1709 of Figure 27).It addition, to stop (5ms) → reversal voltage (15ms)
→ termination (5ms) → rotating forward voltage (40ms) is one group and repeats in the present embodiment for arriving
The voltage of position.
On the other hand, if the increment rate of electric current is equal to or less than threshold value f (S1708: no),
Then load high and whether put in place unrelated with wood screw.It is therefore contemplated that concentrate on for the first arteries and veins
Fastening force in the thrust that the voltage of punch die formula causes is not enough.Therefore, hereafter execution is turned
Change to the second pulse mode.
In the present embodiment, the second pulse mode is selected from the voltage 1 to 5 of the second pulse mode
Formula.As for the voltage 1 to 5 for the second pulse mode, returing cycle is so that this order lengthens
Rotate forward cycle time.Specifically, in the voltage 1 of the second pulse mode, one is being performed
Group stops (5ms) → reversal voltage (15ms) → termination (5ms) → rotating forward voltage (75ms),
One group of termination (7ms) → reversal voltage is being performed in the voltage 2 of the second pulse mode
(18ms) → stop (10ms) → rotating forward voltage (65ms), for the second pulse mode
The voltage 3 of formula performs one group of termination (9ms) → reversal voltage (20ms) → termination (12ms)
→ rotate forward voltage (59ms), performing in one group in the voltage 4 of the second pulse mode
Only (11ms) → reversal voltage (23ms) → termination (13ms) → rotating forward voltage (53ms),
And in the voltage 5 of the second pulse mode, performing one group of termination (15ms) → reversion
Voltage (25ms) → termination (15ms) → rotating forward voltage (45ms).
First, if having determined that in S1708 and being transformed into the second pulse mode (S1708: no),
Then judge when applying for the rotating forward voltage of the voltage of the first pulse mode (during declining)
Time inflow motor 1003 electric current whether more than threshold value g1(S1710).Threshold value g1Arrange
Become distinguish whether should will be above the voltage 1 for the second pulse mode for the second pulse
The voltage of pattern is applied to motor 1003, and threshold value g in the present embodiment1It is set as
76A.It addition, it is following by the stream when applying the rotating forward voltage of each voltage for pulse mode
The electric current entering motor 1003 is generically and collectively referred to as reference current.
If reference current is more than threshold value g1(S1710: yes), then judge that this electric current is the biggest
In threshold value g2(S1711).Threshold value g2It is arranged to distinguish and whether should will be above for second
The voltage for the second pulse mode of the voltage 2 of pulse mode is applied to motor 1003,
And threshold value g in the present embodiment1It is set as 77A.
If this electric current is more than threshold value g2(S1711: yes), then judge whether this electric current is more than
Threshold value g3(S1712).Threshold value g3It is arranged to distinguish and whether should will be above for the second arteries and veins
The voltage for the second pulse mode of the voltage 3 of punch die formula is applied to motor 1003, and
And threshold value g in the present embodiment3It is set as 79A.
If this electric current is more than threshold value g3(S1712: yes), then judge whether this electric current is more than
Threshold value g4(S1713).Threshold value g4It is arranged to distinguish and whether should will be above for the second arteries and veins
The voltage for the second pulse mode of the voltage 4 of punch die formula is applied to motor 1003, and
And threshold value g in the present embodiment3It is set as 80A.
In the manner, it is primarily based on when applying the voltage for the first pulse mode
Time (rotating forward voltage), the electric current of inflow motor 1003 judges which be used for
The voltage of two pulse modes is applied to motor 1003, is used for the second arteries and veins by judge subsequently
The voltage of punch die formula is applied to motor 1003.
Specifically, if this electric current is equal to or less than threshold value g1(S1710: no), then will
Voltage 1 for the second pulse mode is applied to motor 1003 (S1714)；If this electricity
Stream is more than threshold value g1And equal to or less than threshold value g2(S1711: no), then will be used for
The voltage 2 of two pulse modes is applied to motor 1003 (S1715)；If this electric current is more than
Threshold value g2And equal to or less than threshold value g3(S1712: no), then will be used for the second pulse
The voltage 3 of pattern is applied to motor 1003 (S1716)；If this electric current is more than threshold value
g3And equal to or less than threshold value g4(S1713: no), then will be used for the second pulse mode
Voltage 4 is applied to motor 1003 (S1717)；And if this electric current is more than threshold value g4
(S1713: yes), then be applied to motor 1003 by the voltage 5 being used for the second pulse mode
(S1718)。
In applying after the voltage 1 (S1714) of the second pulse mode, it is subsequently determined that and works as
Apply inflow motor 1003 when voltage 1 (the rotating forward voltage) of the second pulse mode
Whether electric current is more than threshold value g1(S1719)。
If this electric current equals to or less than threshold value g1 (S1719: no), then process and return S1707,
Again in which judges by being used for the voltage of the first pulse mode and be used for the second pulse mode
Voltage 1 in any one be applied to motor 1003.On the other hand, if this electric current is big
In threshold value g1(S1719: yes), then be applied to electricity by the voltage 2 being used for the second pulse mode
Motivation 1003 (S1715).
In applying after the voltage 2 (S1715) of the second pulse mode, it is subsequently determined that and works as
Apply inflow motor 1003 when voltage 2 (the rotating forward voltage) of the second pulse mode
Whether electric current is more than threshold value g2(S1720)。
If this electric current equals to or less than threshold value g2(S1720: no), then process and return S1710,
Again in which judges by being used for the voltage 1 of the second pulse mode and be used for the second pulse mode
Which one in the voltage 2 of formula is applied to motor 1003.On the other hand, if this electric current
More than threshold value g2(S1720: yes), then be applied to the voltage 3 being used for the second pulse mode
Motor 1003 (S1716).
In applying after the voltage 3 (S1716) of the second pulse mode, it is subsequently determined that and works as
Apply inflow motor 1003 when voltage 3 (the rotating forward voltage) of the second pulse mode
Whether electric current is more than threshold value g3(S1721)。
If this electric current equals to or less than threshold value g3(S1721: no), then process and return S1711,
Again in which judges by being used for the voltage 2 of the second pulse mode and be used for the second pulse mode
Which one in the voltage 3 of formula is applied to motor 1003.If this electric current is more than threshold value g3
(S1721: yes), then be applied to motor 1003 by the voltage 4 being used for the second pulse mode
(S1717)。
In applying after the voltage 4 (S1717) of the second pulse mode, it is subsequently determined that and works as
Apply inflow motor 1003 when voltage 4 (the rotating forward voltage) of the second pulse mode
Whether electric current is more than threshold value g4(S1722)。
If this electric current equals to or less than threshold value g4(S1722: no), then process and return S1712,
Again in which judges by being used for the voltage 3 of the second pulse mode and be used for the second pulse mode
Which one in the voltage 4 of formula is applied to motor 1003.If this electric current is more than threshold value g4
(S1722: yes), then be applied to motor 1003 by the voltage 5 being used for the second pulse mode
(S1718)。
In applying after the voltage 5 (S1718) of the second pulse mode, it is subsequently determined that and works as
Apply inflow motor 1003 when voltage 5 (the rotating forward voltage) of the second pulse mode
Whether electric current is more than threshold value g5(S1723).Threshold value g5It is arranged to distinguish and whether should will use
Voltage 5 in the second pulse mode is applied to motor 1003, and threshold in the present embodiment
Value g5It is set as 82A.
If this electric current equals to or less than threshold value g5(S1723: no), then process and return S1713,
Again in which judges by being used for the voltage 4 of the second pulse mode and be used for the second pulse mode
Which one in the voltage 5 of formula is applied to motor 1003.If this electric current is more than threshold value g5
(S1723: yes), then be applied to motor 1003 by the voltage 5 being used for the second pulse mode
(S1718)。
On the other hand, if the absolute value of the electric current of inflow motor 1003 is equal to or less than threshold
Value d (S1705: no), i.e. if fastening bolt, the most preferably need not by compressing
Fasten, and preferably be carried out hitting under the pattern that counteracting force is reduced to greatest extent
Hit.Therefore, in this case, the voltage 5 of the second pulse mode is applied to motor 1003
And not via the voltage 1 to 4 (S1718) of the first pulse mode and the second pulse mode.
Therefore, in the electronic pulse driver under the pulse mode according to the present embodiment, logical
Crossing the electric current increasing inflow motor 1003, returing cycle increases (the with the ratio in the cycle of rotating forward
The rotating forward cycle time (S1706 of Figure 27) of one pulse mode, turns from the first pulse mode
Change to the second pulse mode (S1707 of Figure 27), and at the second pulse mode 1 to 5
Between conversion (S1719 to S1722 of Figure 27)).Accordingly, it is capable to suppression from treat into
The counteracting force of the parts of row operation, and it is provided that the most comfortable percussion tool.
It addition, the electronic pulse driver 1001 under the pulse mode according to the present embodiment
In, if the electric current of inflow motor 1003 is equal to or less than threshold value e when fastening wood screw,
Then under the first pulse mode concentrated in thrust, perform fastening.Therefore, if electric current
More than threshold value e, then under the second pulse mode concentrated on impact dynamic, perform fastening (figure
The S1707 of 27).Therefore, it can perform fastening under the pattern being more suitable for wood screw.
It addition, the electronic pulse driver 1001 under the pulse mode according to the present embodiment
In, by be used for the reversal voltage that securing member distinguishes be applied to motor 1003 (Figure 27's
S1704).In this case, if the electric current of inflow motor 1003 is more than threshold value d, then
Judge securing member as wood screw, and if this electric current is less than threshold value d, then judge securing member as
Bolt.Process the pattern (S1705 of Figure 27) proceeding to be suitable for corresponding situation.Therefore, may be used
Perform suitably to fasten with the type according to securing member.
It addition, the electronic pulse driver 1001 under the pulse mode according to the present embodiment
In, if the increment rate of electric current when the electric current of inflow motor 1003 has increased to threshold value e
Equal or exceed threshold value f (S1708 of Figure 27: yes), be then considered as wood screw putting in place,
And will be used for putting in place in the case of the switching circulation rotating forward electric power and reversion electric power is shortened
Voltage be applied to motor 1003.Thus, can reduce subsequently from the portion of pending operation
The counteracting force of part, provides the conventional electricity carried out along with fastening and shorten with impingement interval simultaneously
The sensation that subpulse driver is identical.
It addition, the electronic pulse driver 1001 under the pulse mode according to the present embodiment
In, perform to be transformed into most preferably from the first pulse mode according to the electric current of inflow motor 1003
The second pulse mode (S1710 to S1713 of Figure 27).Therefore, even if flowing into electronic
The electric current of machine 1003 increases the most suddenly, it is also possible to perform fastening under suitable impact mode.
It addition, in electronic pulse driver under the pulse mode according to the present embodiment, only
Can be second between the second pulse mode that the switching cycle rotated and reverse is adjacent one another are
(S1719 to S1723 of Figure 27) is changed between pulse mode 1 to 5.Therefore, it can
Prevent sensorial unexpected change.
It addition, in electronic pulse driver 1001 in the present embodiment, by using applying
Before the reversal voltage of fastening, apply the reversal voltage for coordinating with motor 1003 and make
Percussion hammer 1042 inverts and impinges upon (S1601 of Figure 26) on anvil 1052.Therefore, i.e.
Make to coordinate insufficient between securing member with tip end tool, also can make securing member and tip end tool
It is fitted to each other securely, and is possible to prevent tip end tool to deviate from from securing member during operation.
It addition, the electronic pulse driver 1001 under the clutch mode according to the present embodiment
In, electric by applying the rotating forward for pre-starting before applying the rotating forward voltage for fastening
Press and make percussion hammer 1042 and anvil 1052 (S1601 of Figure 26, and Figure 27 contacting one another
S1701).It is therefore possible to prevent the moment of torsion exceeding target torque is supplied to due to shock
Securing member.
It addition, the electronic pulse driver 1001 under the clutch mode according to the present embodiment
In, false clutch stop after elapse of a predetermined time producing from it (S1609 of Figure 26 and
S1610).Therefore, it can suppress power consumption and intensification.
It addition, the electronic pulse driver 1001 under the clutch mode according to the present embodiment
In, when fastening bolt, the reversal voltage being used for braking is applied to motor 1003, and
Reach target torque (S1607 of Figure 26).Therefore, even if fastening such as moment of torsion is turned round in target
Suddenly the such securing member of bolt increased before square, it is also possible to prevent supply because of inertia force
The moment of torsion caused, and accurate target torque can be supplied.
Describe the electronic impulse according to the 4th embodiment next with reference to Figure 28 and 29 to drive
Device 1201.
In the third embodiment, in the case of not considering variations in temperature, increase when electric current etc.
When being added to specific threshold, collision conditions (aspect) changes.But, such as, due to gear
The viscosity of the oils and fats in mechanism 1041 is relatively low at cold district, so inflow motor 1003
Electric current commonly greater than usually.In this case, the electric current of inflow motor 1003 is prone to super
Cross threshold value, and there is the probability changing collision conditions, and with change the feelings of collision conditions
Shape is unrelated.
Therefore, this embodiment is characterized in that consideration variations in temperature is to change threshold value.Concrete and
Speech, arranges temperature detecting unit on switchboard 1063, and control unit 1072 based on
The temperature detected by temperature detecting unit changes each threshold value.
Figure 28 illustrates and fastens the changes of threshold during wood screw under clutch mode, and
Figure 29 illustrates and fastens the changes of threshold during wood screw in the pulsing mode.
Control unit 1072 will trigger at low temperature the most as shown in Figure 28 and be used for screw loosening
The threshold value a ' and target current value T ' of applying of reversal voltage be set higher than triggering at room temperature
For threshold value a of applying of reversal voltage and the value of target current value T of screw loosening, and
And the threshold value c ' of the first pulse mode will be transformed at low temperature and be transformed into the as shown in Figure 29
The threshold value e ' of two pulse modes is set higher than being transformed into threshold value c of the first pulse mode in room temperature
Value with threshold value e being transformed into the second pulse mode.
By considering that variations in temperature changes threshold value in this way, can be in suitable situation
Change collision conditions.It addition, threshold value to be changed is not limited to aforesaid threshold values, and permissible
Change other threshold value any.It addition, temperature detecting unit may be provided at beyond motor 1003
Position.
It follows that the electronic pulse driver according to the 5th embodiment will be described with reference to Figure 14
1301。
In the fourth embodiment, emphasize workability and change threshold value.But, in this enforcement
In example, emphasize the ruggedness of electronic pulse driver 1201, and change and to rotate and reverse
Switching circulation.
Specifically, in the present embodiment, being similar to the 4th embodiment, motor 1003 is also
It is equipped with temperature detecting unit, and control unit 1072 is based on by this temperature detecting unit
The temperature detected changes the switching circulation rotated and reverse.It addition, in this case,
Temperature detecting unit may also be arranged on the position beyond motor 1003.
Figure 30 illustrates and fastens the switching rotated and reverse during wood screw in the pulsing mode
The change of circulation.
Control unit 1072 the most as shown in figure 30 by the rotating forward cycle of the first pulse mode with
Returing cycle at high temperature switching circulation be set as than the first pulse mode the rotating forward cycle and
Returing cycle switching circulation at normal temperatures is long.This can suppress the heating caused when switching,
And any damage that the high temperature that can suppress the FET of electronic pulse driver 1301 causes.Separately
Outward, the coating of starter coil can be kept to avoid hot injury, and whole electronics can be strengthened
The ruggedness of pulse driver 1301.
Describe the electronic impulse according to sixth embodiment next with reference to Figure 32 and 33 to drive
Device 1401.The structure identical with the component of the electronic pulse driver 1001 according to the 3rd embodiment
Part is denoted by the same reference numerals, and the descriptions thereof are omitted.
As shown in Figure 32, electronic pulse driver 1401 includes percussion hammer 1442 and anvil 1452.
In the electronic pulse driver 1001 according to the 3rd embodiment, along percussion hammer 1042 and anvil 1052
Between direction of rotation gap set be about 315 degree.At the electronics according to sixth embodiment
In pulse driver 1401, along the gap of the direction of rotation between percussion hammer 1442 and anvil 1452
Set and be about 135 degree.
Figure 33 is the sectional view as viewed from the direction XVII from Figure 32, and illustrates at electricity
Position relationship between percussion hammer 1442 and anvil 1452 during subpulse driver 1401 operation.
Perform reversion with the shape contacting one another as Figure 33 (1) from percussion hammer 1442 and anvil 1452
State reaches in Figure 33 (3) percussion hammer 1442 about anvil 1452 via Figure 33 (2) state
Big backward position.Then, motor 1003 rotates forward, and percussion hammer 1442 and anvil 1452 are sent out each other
Raw collision (Figure 33 (5)), and anvil 1452 is by impacting the counter clockwise direction along Figure 33
Rotate (Figure 33 (6)).
In this case, the magnitude of voltage of the 3rd embodiment, current value, second can suitably be changed
Number waits so that the electronic pulse driver 1401 being suitable in sixth embodiment.
It addition, the electronic pulse driver of the present invention is not limited to above-described embodiment, and energy
In the range of statement, various modification can be adapted in the claims and improves.
Such as, in the above-described embodiments, in the conversion between the second pulse mode 1 to 5,
Even consider the electricity for the second pulse mode processing a position before return voltage
The situation (S1719 to S1722 of Figure 27: no) of pressure.But, as shown in Figure 31,
Workman feels for the previous voltage of the second pulse mode owing to performing control to just will not return
To comfortable.Although it addition, describing the most in the above-described embodiments when fastening wood screw or bolt
Control, but present inventive concept also can be used in unclamp (dismounting) period.Specifically, as
Shown in the schematic diagram of Figure 34, when unclamping wood screw or like, with the longest reversion
Cycle starts the applying of voltage from the voltage 5 for the second pulse mode, and along with electric current
Become equal to or less than each threshold value, make to the voltage 1 for the second pulse mode by
Gradually change.Thus, even if wood screw or like are carried out operation, it is possible to provide comfortable
Sensation.
It addition, in the above-described embodiments, based on electric in the reversion applying to distinguish for securing member
After pressure, the electric current of inflow motor 1003 distinguishes securing member (S 1705 of Figure 27).So
And, securing member can be distinguished based on the revolution etc. of motor 1003.
It addition, in the above-described embodiments, use in the S1719 to S1722 of Figure 27 with
Threshold value g that S1710 to S1713 is identical1To g4.However, it is possible to use be individually worth.
It addition, in the above-described embodiments, electronic pulse driver is provided only with an anvil
1052.Accordingly, there exist anvil 1052 and the possibility of separate maximum 360 degree of percussion hammer 1042
Property.But, such as, another anvil may be provided between anvil and percussion hammer.It is thus possible to contracting
Short when applying the reversal voltage for coordinating (S1601 of Figure 26, and the S1701 of Figure 27)
Or time needed for (S1602 of Figure 26) when applying for the pre-rotating forward voltage started.
It addition, in the above-described embodiments, made by the rotating forward voltage applied for pre-starting
Percussion hammer 1042 and anvil 1052 are contacting one another.But, even if percussion hammer and anvil are the most each other
Contact, as long as percussion hammer 1042 can keep constant relative to the initial positional relationship of anvil 1052,
It can also be envisaged that alternate manner.
It addition, although the power tool of the present invention is constructed so that percussion hammer forward or reverse, but
Power tool not necessarily has this structure.Such as, can be taken through Continuous Drive percussion hammer with
The most just transferring the power tool clashing into anvil.Pass through although the power tool of the present invention has percussion hammer
The structure that the motor that rechargeable battery drives drives, but percussion hammer can be by moving beyond motor
Power source drives.Such as, as the example of power source, electromotor, or motor can be used
Can be driven by fuel cell or solaode.
Industrial usability
According to an aspect of the present invention, it is provided that a kind of percussion tool, wherein beater mechanism by
Percussion hammer and the anvil with simple mechanism realize.
According to a further aspect in the invention, it is provided that a kind of percussion tool, this percussion tool energy
Enough drive the relative rotation angle percussion hammer less than 360 degree and anvil, thus by design motor
Driving method perform tightening operation.
Claims (5)
1. a power tool, including:
Motor, described motor can rotate and reverse；
Percussion hammer, described percussion hammer is by the driving force supplied from described motor and along forward direction
Or reverse directions rotates；
Anvil, described anvil is knocked and by described percussion hammer along the rotation of described forward direction
Rotating, described percussion hammer obtains acceleration distance due to the rotation along described reverse directions；
Tip end tool maintaining part, described tip end tool maintaining part can keep tip end tool and
The rotation of described anvil is delivered to described tip end tool；
Power supply unit, said supply unit switches between rotating forward electric power and reversion electric power
To be supplied to described motor；And
Control unit, described control unit controls said supply unit to flow into described electricity
The electric current of motivation has additional supply of described reversion electric power cycle in the case of increasing is described with supply
Rotate forward the ratio in the cycle of electric power.
Power tool the most according to claim 1,
Wherein, described control unit increases to predetermined value at the electric current flowing into described motor
First step controls under the first mode rotating forward cycle time that supply rotates forward electric power power supply
Unit, and in the electric current of inflow motor has exceeded the second step of described predetermined value
Said supply unit is controlled under the second pattern that the returing cycle of supply reversion electric power lengthens.
Power tool the most according to claim 2,
Wherein, described control unit can be in the second step from having the multiple of different ratio
Second pattern selects a pattern.
Power tool the most according to claim 2,
Wherein, in described second step, described control unit is only allowed in be had the most on year-on-year basis
From there is the second patten transformation of short returing cycle to having length in the middle of multiple second patterns of rate
Second pattern of returing cycle.
Power tool the most according to claim 2,
Wherein, in described second step, described control unit only allows to be transformed into have not
With the second mould that the length in the middle of multiple second patterns of ratio is adjacent with described returing cycle
Formula.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009177116A JP5440767B2 (en) | 2009-07-29 | 2009-07-29 | Impact tools |
| JP2009-177116 | 2009-07-29 | ||
| JP2010083755A JP5464433B2 (en) | 2010-03-31 | 2010-03-31 | Electric tool |
| JP2010-083757 | 2010-03-31 | ||
| JP2010-083755 | 2010-03-31 | ||
| JP2010083757A JP5472736B2 (en) | 2010-03-31 | 2010-03-31 | Electric tool |
| PCT/JP2010/063235 WO2011013853A2 (en) | 2009-07-29 | 2010-07-29 | Impact tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102639301A CN102639301A (en) | 2012-08-15 |
| CN102639301B true CN102639301B (en) | 2016-12-14 |
Family
ID=
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695900A (en) * | 2004-05-12 | 2005-11-16 | 松下电工株式会社 | Rotary impact tool |
| CN1824464A (en) * | 2005-02-23 | 2006-08-30 | 松下电工株式会社 | Impact fastening tool |
| CN101171101A (en) * | 2005-05-12 | 2008-04-30 | 株式会社埃斯帝克 | Control method and device for impact screw tightening device |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695900A (en) * | 2004-05-12 | 2005-11-16 | 松下电工株式会社 | Rotary impact tool |
| CN1824464A (en) * | 2005-02-23 | 2006-08-30 | 松下电工株式会社 | Impact fastening tool |
| CN101171101A (en) * | 2005-05-12 | 2008-04-30 | 株式会社埃斯帝克 | Control method and device for impact screw tightening device |
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