CN206211869U - A kind of electric tool and its power supply change-over device - Google Patents
A kind of electric tool and its power supply change-over device Download PDFInfo
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- CN206211869U CN206211869U CN201621189716.1U CN201621189716U CN206211869U CN 206211869 U CN206211869 U CN 206211869U CN 201621189716 U CN201621189716 U CN 201621189716U CN 206211869 U CN206211869 U CN 206211869U
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Abstract
The utility model is related to voltage control field, and in particular to a kind of electric tool and its power supply change-over device.Wherein, power supply change-over device includes：Voltage conversion circuit, for the output voltage of battery bag to be converted into first voltage, wherein, voltage of the first voltage for needed for motor works；Booster circuit, for the output voltage of battery bag to be converted into second voltage, second voltage is more than first voltage；Or, the input of booster circuit is connected with the output end of voltage conversion circuit, and output end is connected with the power input of motor, for first voltage to be converted into second voltage；Control unit, for controlling starting or stoping for booster circuit.The utility model, input voltage higher is obtained by using booster circuit so that the rotating speed of motor can also make corresponding adjustment when increase is loaded in the electric tool course of work, improves the demand that motor speed meets load increase.
Description
Technical field
The utility model is related to voltage control field, and in particular to a kind of electric tool and its power supply change-over device.
Background technology
Existing electric tool, the electric tool especially powered using battery bag out of doors, its machine motor in itself,
Power supply characteristic is substantially stationary, when in the electric tool course of work, the rotating speed of motor cannot meet demand during load increase.Such as garden
The felling tools such as saw, chain saw, are being lumbered with it to the disconnected moment is cut down soon, and because trees are cut, the strong point is destroyed, trees
Original balance is broken, and trees can topple over to disconnected one side is not cut down；Trees toppling process, because trunk is not cut completely
It is disconnected；Part without cut-out is connected to tree root and trunk；Trunk can tear, and cause the valuable trunk part of trees to damage
Seriously, the economic worth of trees is reduced.And existing electric tool is substantially stationary due to its motor, power supply characteristic, in trunk
When being cut off soon, due to the destruction of the strong point, Cutting Drag is sharply increased, and cutting speed declines quickly, will so prolong significantly
The time for completely cutting through is grown, the degree for causing trunk to tear increases.
Utility model content
The technical problems to be solved in the utility model is because the motor of existing electric tool, power supply characteristic are fixed and led
The rotating speed for sending a telegraph motor when increase is loaded in the power driven tools course of work cannot meet demand, thus provide a kind of electric tool and its
Power supply change-over device.
A kind of one side of the utility model embodiment, there is provided power supply change-over device for electric tool, including：Electricity
Pressure translation circuit, input is connected with battery bag, and output end is connected with the power input of motor, for by the battery bag
Output voltage be converted to first voltage, wherein, the first voltage for the motor work needed for voltage；Booster circuit,
Input is connected with the battery bag, and output end is connected with the power input of the motor, for by the battery bag
Output voltage be converted to second voltage, the second voltage is more than the first voltage；Or, the input of the booster circuit
End is connected with the output end of the voltage conversion circuit, and output end is connected with the power input of the motor, for by institute
State first voltage and be converted to the second voltage；Control unit, for controlling starting or stoping for the booster circuit, wherein,
When the booster circuit is not actuated, the motor works under the first voltage；It is described when the booster circuit starts
Motor works under the second voltage.
Alternatively, described control unit includes：First switch, for controlling being switched on or switched off for the booster circuit；The
Two switches, for controlling to connect on-off between the output end of the voltage conversion circuit and the power input of the motor
Open.
Alternatively, in the case that the first switch is closed, the second switch disconnects；The feelings that the first switch disconnects
Under condition, the second switch closure.
Alternatively, the first switch is arranged on the motor in the form of button.
Alternatively, the first switch is time switch.
Alternatively, the booster circuit is boost booster circuits.
Alternatively, the booster circuit includes：Inverter circuit, DC side is connected with battery bag, for by the battery
The direct current for wrapping output is converted to alternating current；Transforming circuit, primary coil is connected with the AC of the inverter circuit, secondary wire
Circle is connected with the power input of the motor.
A kind of another aspect of the utility model embodiment, there is provided electric tool, including：Motor；Described power supply turns
Changing device, the voltage needed for for the output voltage of battery bag to be converted into the motor work.
According to the utility model embodiment, by increasing booster circuit in power supply change-over device, when raising electric tool
Motor input voltage to improve during its rotating speed, obtain input voltage higher using booster circuit so that electric tool work
The rotating speed of motor can also make corresponding adjustment when increase is loaded during work, improve the need that motor speed meets load increase
Ask.
Brief description of the drawings
In order to illustrate more clearly of the utility model specific embodiment or technical scheme of the prior art, below will be right
The accompanying drawing to be used needed for specific embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some implementation methods of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 be the utility model embodiment in for electric tool power supply change-over device a signal for specific example
Figure；
Fig. 2 is that another specific example in the utility model embodiment for the power supply change-over device of electric tool is shown
It is intended to；
Fig. 3 is the change schematic diagram of the input voltage of electric tool in the utility model embodiment.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
As long as additionally, technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can just be combined with each other.
The present embodiment provides a kind of power supply change-over device for electric tool, and the power supply change-over device is used for battery bag
The supply voltage of output be converted into electric tool work needed for voltage, can as a part for electric tool, or
As electric tool external power supply equipment, as shown in figure 1, the power supply change-over device includes：Voltage conversion circuit 201, liter piezoelectricity
Road 202 and control unit 203.
The input of voltage conversion circuit 201 is connected with battery bag 100, the power input of output end and motor 301
Connection, for the output voltage of battery bag 100 to be converted into first voltage, wherein, first voltage is for needed for motor 301 works
Voltage.
The input of booster circuit 202 is connected with battery bag 100, and output end is connected with the power input of motor 301
Connect, for the output voltage of battery bag 100 to be converted into second voltage, second voltage is more than first voltage.
Alternatively, another implementation is as shown in Fig. 2 the input and voltage conversion circuit 201 of booster circuit 202
Output end is connected, and output end is connected with the power input of motor 301, for first voltage to be converted into second voltage.
It is that supply voltage directly can be increased to second voltage, or indirect by raising second voltage by booster circuit 202
Supply voltage is increased to second voltage.
Control unit 203 is used to control starting or stoping for booster circuit 202, wherein, when booster circuit 202 is not actuated
When, motor 301 works under first voltage；When booster circuit 202 starts, motor 301 works under second voltage.
In the utility model embodiment, closure switch S1 when the motor of electric tool works, in general by voltage
Voltage needed for translation circuit 201 provides work is first voltage, when needing to improve motor speed, is controlled by control unit 203
System starts booster circuit 202, supply voltage is boosted into second voltage and that is to say high voltage, there is provided to the motor of electric tool,
It is improved its rotating speed.
According to the utility model embodiment, by increasing booster circuit in power supply change-over device, when raising electric tool
Motor input voltage to improve during its rotating speed, obtain input voltage higher using booster circuit so that electric tool work
The rotating speed of motor can also make corresponding adjustment when increase is loaded during work, improve the need that motor speed meets load increase
Ask.
Such as felling tool such as garden saw, chain saw, is being lumbered with it to the disconnected moment is cut down soon, because trees are cut, branch
Support point is destroyed, and the original balance of trees is broken, and trees can topple over to disconnected one side is not cut down, due to the destruction of the strong point,
Cutting Drag is sharply increased, load increase, and the power supply change-over device provided using the utility model embodiment can be by control
Unit control processed starts booster circuit, to improve the input voltage of motor, so that its rotating speed is improved, quickly cuts trunk,
So as to avoid trunk from tearing or avoid the increase of trunk tear(ing) strength.
The occasion of overload can be realized needing in a short time, the input voltage of electric tool is improved, power supply is not being influenceed
Conversion equipment and on the premise of the electric tool life-span, so as to improve the speedy carding process of electric tool short time, accelerates cutting down for trees
Disconnected speed；So as to reduce trees tear；Improve the economic worth of trees simultaneously, also improve operating efficiency.
It should be noted that in the utility model embodiment, voltage conversion circuit and booster circuit enter line translation and are supplied
The frequency of power supply is the required frequency of electric tool work, and first voltage and second voltage are also needed for electric tool
Operating voltage.
Alternatively, as shown in Figure 1 or 2, control unit 203 includes：First switch S2, for controlling booster circuit 202
Be switched on or switched off；Second switch S3, the power input of output end and motor 301 for control voltage translation circuit 201
Between be switched on or switched off.Further, in the case that first switch is closed, second switch disconnects；The feelings that first switch disconnects
Under condition, second switch closure.
In the utility model embodiment, when booster circuit 202 starts is powered to motor 301, voltage conversion circuit then may be used
To be stopped, or its connection between motor is cut off, directly powered to motor from suitable high-tension circuit 202.
Alternatively, first switch is arranged on motor in the form of button.After electric tool is started, power supply change-over device
The power supply of voltage and frequency needed for output electric tool normal work；Instrument normally starts work；When needing to accelerate electronic work
When tool rotating speed or power output, above-mentioned button is pressed, start booster circuit and start working, and then improve rotating speed and output work
Rate.
Still optionally further, first switch is time switch.After first switch closure, setting time is reached, then certainly
Dynamic circuit breaker is opened, and this causes that electric tool is used under the scene that lumbering etc. needs Short-time Overload, more intelligence and saves electric energy.
Voltage change in electric tool is as shown in figure 3, after switch S1 closures, the output voltage of electric power conversion apparatus is
U1, when S2 is closed, booster circuit startup work, the output voltage of electric power conversion apparatus rises to U0, and starts timing, works as timing
Setting surcharge preloading duration t1 is reached, then power supply change-over device is closed output or returns to normal operating voltage U1.
In the utility model embodiment, when electric tool uses direct current generator, booster circuit can be boost liters
Volt circuit, that is to say switch DC booster circuit, the direct current for battery bag to be exported boost to motor needed for direct current.
Alternatively, if electric tool uses the booster circuit of alternating current generator, the utility model embodiment can to include：
Inverter circuit, DC side is connected with battery bag, and the direct current for battery bag to be exported is converted to alternating current；Transforming circuit,
Primary coil is connected with the AC of inverter circuit, and secondary coil is connected with the power input of motor.By using inversion
The DC conversion that circuit exports battery bag is alternating current, then by power transformation circuit, the work needed for being boosted to motor
Voltage.
The utility model embodiment additionally provides a kind of electric tool, and the electric tool includes：Motor and the utility model
The power supply change-over device that embodiment is provided, wherein, power supply change-over device is used to for the output voltage of battery bag to be converted to motor work
Voltage needed for making.
Above-mentioned motor can be direct current generator, or alternating current generator, and the description of power supply change-over device is referring specifically to upper
Embodiment is stated, is repeated no more here.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of implementation method.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need and unable to be exhaustive to all of implementation method.And the obvious change thus extended out or
Among changing still in the protection domain of the application.
Claims (8)
1. a kind of power supply change-over device for electric tool, it is characterised in that including：
Voltage conversion circuit, input is connected with battery bag, and output end is connected with the power input of motor, for by described in
The output voltage of battery bag is converted to first voltage, wherein, voltage of the first voltage for needed for the motor works；
Booster circuit, input is connected with the battery bag, and output end is connected with the power input of the motor, is used for
The output voltage of the battery bag is converted into second voltage, the second voltage is more than the first voltage；Or, the liter
The input of volt circuit is connected with the output end of the voltage conversion circuit, and output end is connected with the power input of the motor
Connect, for the first voltage to be converted into the second voltage；
Control unit, for controlling starting or stoping for the booster circuit, wherein, when the booster circuit is not actuated, institute
Motor is stated to be worked under the first voltage；When the booster circuit starts, the motor works under the second voltage.
2. power supply change-over device according to claim 1, it is characterised in that described control unit includes：
First switch, for controlling being switched on or switched off for the booster circuit；
Second switch, for controlling the connection between the output end of the voltage conversion circuit and the power input of the motor
Or disconnect.
3. power supply change-over device according to claim 2, it is characterised in that in the case that the first switch is closed, institute
State second switch disconnection；In the case that the first switch disconnects, the second switch closure.
4. the power supply change-over device according to Claims 2 or 3, it is characterised in that the first switch is in the form of button
It is arranged on the motor.
5. power supply change-over device according to claim 4, it is characterised in that the first switch is time switch.
6. power supply change-over device according to claim 1, it is characterised in that the booster circuit is boost booster circuits.
7. power supply change-over device according to claim 1, it is characterised in that the booster circuit includes：
Inverter circuit, DC side is connected with battery bag, for the direct current that the battery bag is exported to be converted into alternating current；
Transforming circuit, primary coil is connected with the AC of the inverter circuit, the power input of secondary coil and the motor
End is connected.
8. a kind of electric tool, it is characterised in that including：
Motor；
Power supply change-over device any one of claim 1 to 7, for the output voltage of battery bag to be converted into the electricity
Voltage needed for machine work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621189716.1U CN206211869U (en) | 2016-11-04 | 2016-11-04 | A kind of electric tool and its power supply change-over device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621189716.1U CN206211869U (en) | 2016-11-04 | 2016-11-04 | A kind of electric tool and its power supply change-over device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211869U true CN206211869U (en) | 2017-05-31 |
Family
ID=58752760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621189716.1U Active CN206211869U (en) | 2016-11-04 | 2016-11-04 | A kind of electric tool and its power supply change-over device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326790A (en) * | 2018-02-21 | 2018-07-27 | 单杰 | Electric tool |
| EP3398428A1 (en) * | 2017-05-03 | 2018-11-07 | Blount, Inc. | Power modulating motor control method |
-
2016
- 2016-11-04 CN CN201621189716.1U patent/CN206211869U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3398428A1 (en) * | 2017-05-03 | 2018-11-07 | Blount, Inc. | Power modulating motor control method |
| US10469018B2 (en) | 2017-05-03 | 2019-11-05 | Blount, Inc. | Power modulating motor control method |
| CN108326790A (en) * | 2018-02-21 | 2018-07-27 | 单杰 | Electric tool |
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