CN209003821U - The scrubbing brush driving device of dust catcher - Google Patents
The scrubbing brush driving device of dust catcher Download PDFInfo
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- CN209003821U CN209003821U CN201821235728.2U CN201821235728U CN209003821U CN 209003821 U CN209003821 U CN 209003821U CN 201821235728 U CN201821235728 U CN 201821235728U CN 209003821 U CN209003821 U CN 209003821U
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Abstract
The utility model proposes a kind of scrubbing brush driving device of dust catcher, the scrubbing brush driving device of the dust catcher includes: the first and second output ends being connected respectively with scrubbing brush；PWM input terminal receives pwm signal；The drive module being connected between PWM input terminal and the first and second output ends generates driving signal according to pwm signal, and exports to the first and second output ends；The detection module being connected with first and/or second output terminal detects the insert state of scrubbing brush.The scrubbing brush driving device of the dust catcher of the utility model has the characteristics that low-power consumption, low cost, easily assembled, harness is few and safe.
Description
Technical field
The utility model relates to field of intelligent control technology more particularly to a kind of scrubbing brush driving devices of dust catcher.
Background technique
Floor brush of dust collector control technology, which mainly has, does not detect interface feedback technique two on scrubbing brush plugging technique and ground brush module
Kind.
The implementation for not detecting scrubbing brush plugging technique is that scrubbing brush control circuit is opened after booting, output control brush electricity
The pulse width of pressure modulates (Pulse Width Modulation, abbreviation PWM) signal.No matter scrubbing brush is pulled out and is inserted into, this
PWM exists always, therefore, does not detect scrubbing brush plugging technique scrubbing brush plug terminal band high voltage always, dangerous, and circuit
Plate oneself power consumption is big.
The implementation of interface feedback technique is on ground brush module, in addition to two control mouths of scrubbing brush, is in addition further added by one
Interface, ground brush module, which feeds back to dust catcher master control system scrubbing brush by this interface, whether there is, and therefore, connect on ground brush module
Mouth feedback technique need to increase feedback interface, increase harness, assembling is complicated, at high cost.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.
For this purpose, the purpose of this utility model is that proposing a kind of scrubbing brush driving device of dust catcher, it is ensured that scrubbing brush driving
Device has the characteristics that low-power consumption, low cost, easily assembled, harness is few and safe.
In order to achieve the above objectives, the utility model first aspect embodiment proposes a kind of scrubbing brush driving dress of dust catcher
It sets, comprising:
First output end and second output terminal, first output end and second output terminal are connected with scrubbing brush；
PWM input terminal, for receiving pwm signal；
The drive module being connected between the PWM input terminal and first output end and second output terminal, is used for
Driving signal is generated according to the pwm signal, and driving signal is exported to first output end and second output terminal；
Detection module, the detection module are connected with described first and/or second output terminal, for detecting the scrubbing brush
Insert state.
According to the scrubbing brush driving device for the dust catcher that the utility model embodiment proposes, PWM input terminal receives pwm signal,
Drive module between first output end and second output terminal generates driving signal according to pwm signal, and driving signal is exported
To first output end and second output terminal, the detection module being connected with first and/or second output terminal completes the scrubbing brush
The detection of insert state, so as to close pwm signal, make the scrubbing brush of dust catcher when detecting that scrubbing brush is not inserted into and (extracts)
The scrubbing brush pluggable terminals of driving device do not continue band high voltage, therefore safety, circuit board are low in energy consumption, in addition connect without increasing feedback
Mouthful, therefore design is simple, easily assembled, at low cost, harness is few.
One embodiment according to the present utility model, the drive module include: to be connected with described and second output terminal
First switch tube, for controlling the earth-return circuit on-off of the second output terminal；The first order being connected with the PWM input terminal is driven
Mover module；The second level driven submodule being connected with the output end of the first order driven submodule, the second level driving
The output end of submodule is connected with the control terminal of the first switch tube.
One embodiment according to the present utility model, the first order driven submodule includes: first resistor, and described first
The first end of resistance is connected with the PWM input terminal；The first end of second resistance, the second resistance is connected with power supply；First
The first end of driving tube, first driving tube is connected with the second end of the second resistance, and the second of first driving tube
End ground connection, the control terminal of first driving tube is connected with the second end of the first resistor, wherein the of the second resistance
Two ends are the output end of the first order driven submodule.
One embodiment according to the present utility model, the second level driven submodule includes: 3rd resistor, the third
The first end of resistance is connected with the power supply；Second driving tube, the control terminal and the first order of second driving tube drive
The output end of submodule is connected, and the first end of second driving tube is connected with the second end of the 3rd resistor, and described second
The second end of driving tube is grounded；The first end of 4th resistance, the 4th resistance is connected with the power supply；Third driving tube, institute
The control terminal for stating third driving tube is connected with the second end of the 3rd resistor, the first end of the third driving tube and described the
The second end of four resistance is connected；4th driving tube, the second end phase of the control terminal and the 3rd resistor of the 4th driving tube
Even, the first end of the 4th driving tube is connected with the second end of the third driving tube, the second end of the 4th driving tube
Ground connection；5th resistance, the first end of the 5th resistance and the second end of the third driving tube and the 4th driving tube
First end is connected, and the second end of the 5th resistance is connected with the control terminal of the first switch tube.
One embodiment according to the present utility model, the scrubbing brush driving device further include: be connected to first output
First diode between end and second output terminal.
One embodiment according to the present utility model, the scrubbing brush driving device further include: enabled module makes for receiving
Energy signal, and the detection module is controlled according to the enable signal.
One embodiment according to the present utility model, the detection module include: the second diode, second diode
Anode be connected with the second output terminal；5th driving tube, the first end of the 5th driving tube and second diode
Cathode be connected, the control terminal of the 5th driving tube is connected with the enabled module；6th resistance, the of the 6th resistance
One end is connected with power supply；The first end of 7th resistance, the 7th resistance is connected with the second end of the 5th driving tube；6th
The control terminal of driving tube, the 6th driving tube is connected with the second end of the 7th resistance, and the first of the 6th driving tube
End is connected with the second end of the 6th resistance, the second end ground connection of the 6th driving tube, wherein the 6th driving tube
First end is scrubbing brush insert state test side.
One embodiment according to the present utility model, the enabled module include: the 8th resistance, and the of the 8th resistance
One end is connected with the enable signal；7th driving tube, the control terminal of the 7th driving tube and the second of the 8th resistance
End is connected, and the first end of the 7th driving tube is the output end of the enabled module, the second termination of the 7th driving tube
Ground.
One embodiment according to the present utility model, the drive module include: to be connected with the second output terminal
Two switching tubes；The first order driver being connected with the PWM input terminal；To be connected with the output end of the first order driver
Two-stage actuator；The third level driver being connected with the output end of the second level driver, the third level driver it is defeated
Outlet is connected with the control terminal of the second switch.
One embodiment according to the present utility model, the first order driver include: the 9th resistance, the 9th resistance
First end be connected with the power supply；The first end of tenth resistance, the tenth resistance is connected with the PWM input terminal；8th
The control terminal of driving tube, the 8th driving tube is connected with the second end of the tenth resistance, and the first of the 8th driving tube
End is connected with the second end of the 9th resistance；Eleventh resistor, the first end of the eleventh resistor and the 8th driving
The second end of pipe is connected, the second end ground connection of the eleventh resistor, wherein the first end of the eleventh resistor is described the
The output end of level-one driver.
One embodiment according to the present utility model, the second level driver includes: twelfth resistor, and the described 12nd
The first end of resistance is connected with the power supply；Thirteenth resistor, the first end of the thirteenth resistor and the twelfth resistor
Second end be connected；The control terminal of 9th driving tube, the 9th driving tube is connected with the output end of the first order driver,
The first end of 9th driving tube is connected with the second end of the thirteenth resistor, the second termination of the 9th driving tube
Ground；The control terminal of tenth driving tube, the tenth driving tube is connected with the second end of the twelfth resistor, the tenth driving
The first end of pipe is connected with the power supply, the 14th resistance, first end and the tenth driving tube of the 14th resistance
Second end is connected；The first end of 15th resistance, the 15th resistance is connected with the second end of the 14th resistance, described
The second end of 15th resistance is grounded, wherein the second end of the 14th resistance is the output end of the second level driver.
One embodiment according to the present utility model, the third level driver include: third diode, and the described 3rd 2
The anode of pole pipe is connected with the output end of the second level driver；11st driving tube, the control of the 11st driving tube
End is connected with the output end of the second level driver, the first end of the 11st driving tube and the yin of the third diode
Extremely it is connected, the second end ground connection of the 11st driving tube；16th resistance, the first end of the 16th resistance and described the
The cathode of three diodes is connected, the second end ground connection of the 16th resistance, wherein the cathode of the third diode is described
The output end of third level driver is connected with the control terminal of the second switch.
One embodiment according to the present utility model, the scrubbing brush driving device further include: be connected to first output
The 4th diode between end and second output terminal.
One embodiment according to the present utility model, the detection module include: the first sampling resistor, first sampling
Resistance is used to detect the electric current of the second switch and generates sample rate current；First operational amplifier, first operation are put
Big device is connected with first sampling resistor, for amplifying to the sample rate current, wherein raw according to the sample rate current
At scrubbing brush insert state testing result.
One embodiment according to the present utility model, the detection module further include: first filter, first filtering
Device is connected with first operational amplifier, for being filtered to amplified sample rate current.
One embodiment according to the present utility model, the drive module include: to be connected with first output end
Three switching tubes；The first end of 17th resistance, the 17th resistance is connected with the PWM input terminal；18th resistance, it is described
The first end of 18th resistance is connected with the power supply, the second end of the 18th resistance and the second of the 17th resistance
End is connected；The control terminal of 12nd driving tube, the 12nd driving tube is connected with the second end of the 17th resistance；Second
The first end of ten resistance, the 20th resistance is connected with the power supply；21st resistance, the of the 21st resistance
One end is connected with the power supply；13rd driving tube, the of the control terminal of the 13rd driving tube and the 20th resistance
Two ends are connected, and the first end of the 13rd driving tube is connected with the second end of the 21st resistance；14th driving tube,
The control terminal of 14th driving tube is connected with the second end of the 20th resistance, the first end of the 14th driving tube
It is connected with the second end of the 13rd driving tube, the second end ground connection of the 14th driving tube；22nd resistance, it is described
The first end of 22nd resistance is connected with the second end of the 13rd driving tube, the second end of the 22nd resistance with
The control terminal of the third switching tube is connected.
One embodiment according to the present utility model, the detection module include: the first detection sub-module, first inspection
It surveys submodule to be connected with first output end, for generating the first testing result；Second detection sub-module, second detection
Submodule is connected with the second output terminal, for generating the second testing result；Decision submodule, for according to first inspection
It surveys result and the second testing result generates scrubbing brush insert state testing result.
One embodiment according to the present utility model, the scrubbing brush driving device further include: be connected to first output
The 5th diode between end and second output terminal.
One embodiment according to the present utility model, first detection sub-module include: the 6th diode, and the described 6th
The cathode of diode is connected with first output end；23rd resistance, the first end of the 23rd resistance with it is described
Power supply is connected；The first end of 24th resistance, the 24th resistance is connected with the second end of the 23rd resistance；
The first end of 25th resistance, the 25th resistance is connected with the second end of the 24th resistance, and the described 25th
The second end of resistance is grounded；The first end of 26th resistance, the 26th resistance is connected with the power supply；15th drives
Dynamic pipe, the control terminal of the 15th driving tube are connected with the second end of the 24th resistance, the 15th driving tube
First end be connected with the second end of the 26th resistance, the second end of the 15th driving tube ground connection, wherein described
The second end of 26th resistance is the output end of first detection sub-module.
One embodiment according to the present utility model, second detection sub-module include: the second sampling resistor, and described
Two sampling resistors are used to detect the electric current of the third switching tube and generate sample rate current；Second operational amplifier, described second
Operational amplifier is connected with second sampling resistor, for amplifying to the sample rate current, wherein according to the sampling
Electric current generates second testing result.
One embodiment according to the present utility model, second detection sub-module further include: second filter, described
Two filters are connected with the second operational amplifier, for being filtered to amplified sample rate current.
Detailed description of the invention
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the structural schematic diagram according to the scrubbing brush driving device of the dust catcher of the utility model one embodiment；
Fig. 2 is the circuit diagram according to the scrubbing brush driving device of the dust catcher of the utility model another embodiment；
Fig. 3 is the flow chart of the scrubbing brush control method of the scrubbing brush driving device based on dust catcher shown in Fig. 2；
Fig. 4 is the circuit diagram according to the scrubbing brush driving device of the dust catcher of the utility model another embodiment；
Fig. 5 is the flow chart of the scrubbing brush control method of the scrubbing brush driving device of dust catcher based on shown in Fig. 4；
Fig. 6 is the circuit diagram according to the scrubbing brush driving device of the dust catcher of the utility model another embodiment；
Fig. 7 is the flow chart of the scrubbing brush control method of the scrubbing brush driving device based on dust catcher shown in fig. 6.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
With reference to the accompanying drawing come describe the utility model embodiment dust catcher scrubbing brush driving device.
Fig. 1 is the structural schematic diagram according to the scrubbing brush driving device of the dust catcher of the utility model one embodiment.Such as Fig. 1
Shown, the scrubbing brush driving device of the dust catcher of the utility model embodiment includes:
First output end 11 and second output terminal 12, the first output end 11 and second output terminal 12 are connected with scrubbing brush.
PWM input terminal 13, for receiving pwm signal.
The drive module 14 being connected between PWM input terminal 13 and the first output end 11 and second output terminal 12, is used for
Driving signal is generated according to pwm signal, and driving signal is exported to first output end 11 and second output terminal 12.
Detection module 15, detection module 15 are connected with the first output end 11 and/or second output terminal 12, described for detecting
The insert state of scrubbing brush.
The scrubbing brush driving device of the dust catcher of the utility model embodiment, PWM input terminal receive pwm signal, the first output
It holds and driving signal is generated according to pwm signal the drive module between second output terminal, and driving signal is exported to described the
One output end and second output terminal, the detection module being connected with the first output end and/or second output terminal are completed the scrubbing brush and are inserted
Enter the detection of state, so as to pwm signal be closed, drive the scrubbing brush of dust catcher when detecting that scrubbing brush is not inserted into and (extracts)
The scrubbing brush pluggable terminals of dynamic device do not continue band high voltage, therefore safety, circuit board are low in energy consumption, in addition connect without increasing feedback
Mouthful, therefore design is simple, easily assembled, at low cost, harness is few.
Fig. 2 is the circuit diagram according to the scrubbing brush driving device of the dust catcher of the utility model another embodiment.Such as Fig. 2 institute
To show, drive module 14 includes: the first switch tube Q4 being connected with second output terminal 12 on the basis of embodiment shown in Fig. 1, the
One switching tube Q4 is used to control the on-off of the earth-return circuit of second output terminal 12；The first order driving being connected with PWM input terminal 13
Submodule；The second level driven submodule being connected with the output end of first order driven submodule, second level driven submodule it is defeated
Outlet is connected with the control terminal of first switch tube Q4.
Wherein, first order driven submodule includes: first resistor R14, the first end and PWM input terminal of first resistor R14
13 are connected；The first end of second resistance R11, second resistance R11 are connected with power supply VCC；First driving tube Q8, the first driving tube
First end is connected with the second end of second resistance R11, the second end ground connection of the first driving tube Q8, the control terminal of the first driving tube Q8
It is connected with the second end of first resistor R14, wherein the second end of second resistance R14 is the output end of first order driven submodule.
Wherein, second level driven submodule includes: 3rd resistor R1, and the first end of 3rd resistor R1 is connected with power supply VCC；
Second driving tube Q7, the control terminal of the second driving tube Q7 are connected with the output end of first order driven submodule, the second driving tube Q7
First end be connected with the second end of 3rd resistor R1, the second end of the second driving tube Q7 ground connection；4th resistance R2, the 4th resistance
First end be connected with power supply VCC；The control terminal and the second end phase of 3rd resistor R1 of third driving tube Q2, third driving tube Q2
Even, the first end of third driving tube Q2 is connected with the second end of the 4th resistance R2；4th driving tube Q5, the 4th driving tube Q5's
Control terminal is connected with the second end of 3rd resistor R1, the first end and the second end phase of third driving tube Q2 of the 4th driving tube Q5
Even, the second end ground connection of the 4th driving tube Q5；The first end of 5th resistance R6, the 5th resistance R6 and the second of third driving tube Q2
End is connected with the first end of the 4th driving tube Q5, and the second end of the 5th resistance R6 is connected with the control terminal of first switch tube Q4.
Wherein, the scrubbing brush driving device of the utility model embodiment further include: it is defeated to be connected to the first output end 11 and second
First diode D1 between outlet 12.
Wherein, the scrubbing brush driving device of the utility model embodiment further include: enabled module, for receiving enable signal,
And detection module is controlled according to enable signal.
Wherein, detection module 15 includes: the anode and 12 phase of second output terminal of the second diode D2, the second diode D2
Even；5th driving tube Q1, the first end of the 5th driving tube Q1 are connected with the cathode of the second diode D2, the 5th driving tube Q1's
Control terminal is connected with enabled module；The first end of 6th resistance R3, the 6th resistance R3 are connected with power vd D；7th resistance R5, the
The first end of seven resistance R5 is connected with the second end of the 5th driving tube Q1；6th driving tube Q3, the control terminal of the 6th driving tube Q3
It is connected with the second end of the 7th resistance R5, the first end of the 6th driving tube Q3 is connected with the second end of the 6th resistance R3, and the 6th drives
The second end ground connection of dynamic pipe Q3, wherein the first end of the 6th driving tube Q3 is scrubbing brush insert state test side 16.
Wherein, enabled module includes: the 8th resistance R12, and the first end of the 8th resistance R12 is connected with enable signal；7th
Driving tube Q6, the control terminal of the 7th driving tube Q6 are connected with the second end of the 8th resistance R12, and the first end of the 7th driving tube Q6 is
The output end of enabled module, the second end ground connection of the 7th driving tube Q6.
Wherein, VBAT is cell voltage, and GND is ground connection.
The working principle of the scrubbing brush driving device of the dust catcher of embodiment illustrated in fig. 2 is as shown in table 1: when PWM input terminal 13
When for high level, the first driving tube Q8 conducting, the second driving tube Q7 is not turned on, and the 4th driving tube Q5 is not turned on, third driving tube
Q2 conducting, therefore first switch tube Q4 is connected.When PWM input terminal 13 is low level, the first driving tube Q8 is not turned on, and second
Driving tube Q7 conducting, the 4th driving tube Q5 conducting, third driving tube Q2 is not turned on, therefore first switch tube Q4 is not turned on.
After scrubbing brush insertion, resistance very little between the first output end 11 and second output terminal 12 is equivalent to access.Work as scrubbing brush
It is open circuit between the first output end 11 and second output terminal 12 when being not inserted into and (extracting).
Therefore, after scrubbing brush is inserted into, and when PWM input terminal 13 is high level, the anode of the second diode D2 is low level,
5th driving tube Q1 is not turned on, and the 6th driving tube Q3 is not turned on, therefore scrubbing brush insert state test side 16 is high level.
After scrubbing brush insertion, and when PWMBrush is low level, the anode of the second diode D2 is high level, the 5th driving
Pipe Q1 conducting, the 6th driving tube Q3 conducting, therefore scrubbing brush insert state test side 16t is low level.
When scrubbing brush is not inserted into and (extracts), and PWM input terminal 13 is high level, the anode of the second diode D2 is low electricity
Flat, the 5th driving tube Q1 is not turned on, and the 6th driving tube Q3 is not turned on, therefore scrubbing brush insert state test side 16 is high level.
When scrubbing brush is not inserted into and (extracts), and PWM input terminal 13 is low level, the anode of the second diode D2 is low electricity
Flat, the 5th driving tube Q1 is not turned on, and the 6th driving tube Q3 is not turned on, therefore brush insert state test side 16 is high level.
When obtaining electric, setting enable signal is high level, and the 7th driving tube Q6 is connected, therefore ensure that 15 work of detection module
Make.
The working principle of the scrubbing brush driving device of 1 dust catcher of table
Based on above-mentioned working principle, it can be achieved that detection to scrubbing brush insert state, and when detecting that scrubbing brush is extracted, close
Pwm signal is closed, i.e., so that pwm signal is low level, so that the scrubbing brush pluggable terminals of the scrubbing brush driving device of dust catcher are not
Continue band high voltage, therefore safety, circuit board are low in energy consumption.
Fig. 3 is the flow chart of the scrubbing brush control method of the scrubbing brush driving device based on dust catcher shown in Fig. 2.Such as Fig. 3 institute
Show, scrubbing brush control control method includes:
S101: start to discharge.
S102: output scrubbing brush pwm signal (PWM input terminal 13 has control pulse).
S103: detecting state is pulled out into scrubbing brush.
S104: judge whether scrubbing brush insert state test side 16 continues no pulse output in X seconds.
Detecting state is pulled out if it is not, then returning to S103 and reentering scrubbing brush；If so, into S105 step.
S105: judging that result is pulled out for scrubbing brush, closes scrubbing brush pwm signal (PWM input terminal 13 is low level).
S106: enter scrubbing brush and access detecting state.
S107: judge whether scrubbing brush insert state test side 16 continues X seconds low levels.
If it is not, then returning to S106 enters scrubbing brush access detecting state；If so, into S108 step.
S108: judging result for scrubbing brush insertion, and returning to S102 output scrubbing brush pwm signal, (PWM input terminal 13 has control arteries and veins
Punching).
The scrubbing brush driving device of the dust catcher of the utility model embodiment, PWM input terminal receive pwm signal, the first output
It holds and driving signal is generated according to pwm signal the drive module between second output terminal, and driving signal is exported to described the
One output end and second output terminal, the detection module being connected with second output terminal complete the detection of the scrubbing brush insert state, from
And when can be not inserted into and (extract) detecting scrubbing brush, pwm signal is closed, i.e., so that pwm signal is low level, makes dust catcher
The scrubbing brush pluggable terminals of scrubbing brush driving device do not continue band high voltage, therefore safety, circuit board are low in energy consumption, in addition anti-without increasing
Interface is presented, therefore design is simple, easily assembled, at low cost, harness is few.
Fig. 4 is the circuit diagram according to the scrubbing brush driving device of the dust catcher of the utility model another embodiment.Such as Fig. 4 institute
Show, on the basis of embodiment shown in Fig. 1, drive module 14 includes: the second switch Q10 being connected with second output terminal 12；
The first order driver being connected with PWM input terminal 13；The second level driver being connected with the output end of first order driver；With
The connected third level driver of the output end of two-stage actuator, the control of the output end and second switch Q10 of third level driver
End processed is connected.
Wherein, first order driver includes: the 9th resistance R21, and the first end of the 9th resistance R21 is connected with power supply VCC；The
Ten resistance R23, the first end of the tenth resistance R23 are connected with PWM input terminal 13；8th driving tube Q11, the 8th driving tube Q11's
Control terminal is connected with the second end of the tenth resistance R23, the first end and the second end phase of the 9th resistance R21 of the 8th driving tube Q11
Even；Eleventh resistor R33, the first end of eleventh resistor R33 are connected with the second end of the 8th driving tube Q11, eleventh resistor
The second end of R33 is grounded, wherein the first end of eleventh resistor R33 is the output end of first order driver.
Wherein, second level driver includes: twelfth resistor R18, first end and the power vd D phase of twelfth resistor R18
Even；The first end of thirteenth resistor R20, thirteenth resistor R20 are connected with the second end of twelfth resistor R18；9th driving tube
The control terminal of Q12, the 9th driving tube Q12 are connected with the output end of first order driver, the first end of the 9th driving tube Q12 and the
The second end of 13 resistance R20 is connected, the second end ground connection of the 9th driving tube Q12；Tenth driving tube Q9, the tenth driving tube Q9's
Control terminal is connected with the second end of twelfth resistor R18, and the first end of the tenth driving tube Q9 is connected with power vd D；14th electricity
Q22 is hindered, the first end of the 14th resistance Q22 is connected with the second end of the tenth driving tube Q9；15th resistance R26, the 15th electricity
The first end of resistance R26 is connected with the second end of the 14th resistance R22, the second end ground connection of the 15th resistance, wherein the 14th electricity
The second end for hindering R22 is the output end of second level driver.
Wherein, third level driver includes: third diode D8, anode and the second level driver of third diode D8
Output end is connected；The control terminal of 11st driving tube Q13, the 11st driving tube Q13 are connected with the output end of second level driver,
The first end of 11st driving tube Q13 is connected with the cathode of third diode D8, the second end ground connection of the 11st driving tube Q13；
The first end of 16th resistance Q25, the 16th resistance R25 are connected with the cathode of third diode D8, and the of the 16th resistance R25
Two ends ground connection, wherein the cathode of third diode D8 is the output end of third level driver and the control terminal of second switch Q10
It is connected.
Wherein, the scrubbing brush driving device of the utility model embodiment further include: it is defeated to be connected to the first output end 11 and second
The 4th diode D7 between outlet 12.
Wherein, detection module 15 includes: the first sampling resistor R27, the first sampling resistor R27 for detecting second switch
The electric current of Q10 simultaneously generates sample rate current；First operational amplifier U4A, the first operational amplifier U4A and the first sampling resistor R27
It is connected, for being amplified to sample rate current, wherein scrubbing brush insert state testing result is generated according to sample rate current.
Wherein, detection module 15 further include: first filter (the RC filter constituted including resistance R75 and capacitor C27),
First filter is connected with the first operational amplifier U4A, for being filtered to amplified sample rate current.
Wherein, BATT+ is cell voltage, and GND is ground connection, and J4 is earth brush motor module.
The working principle of the scrubbing brush driving device of embodiment illustrated in fig. 4 is as shown in table 2: when PWM input terminal 13 is high level
When, the 8th driving tube Q11 is not turned on, and the 9th driving tube Q12 is not turned on, and the tenth driving tube Q9 is not turned on, the 11st driving tube Q13
It is not turned on, therefore, second switch Q10 is not turned on.When PWM input terminal 13 is low level, the 8th driving tube Q11 conducting, the
Nine driving tube Q12 conducting, the tenth driving tube Q9 conducting, the 11st driving tube Q13 conducting, therefore, second switch Q10 conducting.
After scrubbing brush insertion, resistance very little between the first output end 11 and second output terminal 12 is equivalent to access.Work as scrubbing brush
It is open circuit between the first output end 11 and second output terminal 12 when being not inserted into and (extracting).
Therefore, when scrubbing brush be inserted into after, and PWM input terminal 13 be high level when, second switch Q10 is not turned on, and first adopts
Sample resistance R27 cannot detect the electric current of second switch Q10 and generate sample rate current, and detection module 15 is without effective work electricity
Stream.
When scrubbing brush insertion after, and PWM input terminal 13 be low level when, second switch Q10 conducting, the first sampling resistor
R27 detects the electric current of second switch Q10 and generates sample rate current, and sample rate current amplifies number by the first operational amplifier
Times, it is then filtered by first filter, stable effective operating current after the output amplification of detection module 15.
When scrubbing brush is not inserted into and (extracts), breaking between the first output end 11 and second output terminal 12, PWM input terminal
13 be high level or low level when, the first sampling resistor R27 cannot detect the electric current of second switch Q10 and generate sampling
Electric current, detection module 15 is without effective operating current.
The working principle of the scrubbing brush driving device of 2 dust catcher of table
Based on above-mentioned working principle, it can be achieved that detection to scrubbing brush insert state, and when detecting that scrubbing brush is extracted, close
Pwm signal is closed, i.e., so that pwm signal is high level, so that the scrubbing brush pluggable terminals of the scrubbing brush driving device of dust catcher are not
Continue band high voltage, therefore safety, circuit board are low in energy consumption.In addition, detecting that scrubbing brush extracts, it, can be with after closing pwm signal
Certain low duty ratio pwm signal is opened in timing, so that scrubbing brush both ends is had a very low voltage, earth brush motor does not move at this time, ground
Weak current of the brush pluggable terminals with very little.So that weak current of the scrubbing brush pluggable terminals not timing with very little, therefore safety, electricity
Road plate is low in energy consumption.
Fig. 5 is the flow chart of the scrubbing brush control method of the scrubbing brush driving device of dust catcher based on shown in Fig. 4.
As shown in figure 5, the scrubbing brush control method includes:
S201: start to discharge.
S202: output scrubbing brush pwm signal (PWM input terminal 13 has control pulse).
S203: constant current closed-loop control or non-closed-loop control.
S204: detecting state is pulled out into scrubbing brush.
S205: judge whether detection module 15 continues to export without effective operating current for X seconds.
Detecting state is pulled out if it is not, then returning to S204 and reentering scrubbing brush；If so, entering step 206.
S206: judging that result is pulled out for scrubbing brush, closes scrubbing brush pwm signal (PWM input terminal 13 is high level).
S207: enter scrubbing brush and access detecting state.
S208: timing PWM input terminal 13 is A, and scrubbing brush both end voltage is B at this time, and earth brush motor is motionless.
S209: judge whether detection module 15 continues to have electric current Ia in X seconds.
If it is not, then returning to S207 reenters scrubbing brush access detecting state；If so, entering step S210.
S210: judging result for scrubbing brush insertion, and returning to S202 output scrubbing brush pwm signal, (PWM input terminal 13 has control arteries and veins
Punching).
The scrubbing brush driving device of the dust catcher of the utility model embodiment, PWM input terminal receive pwm signal, the first output
It holds and driving signal is generated according to pwm signal the drive module between second output terminal, and driving signal is exported to described the
One output end and second output terminal, the detection module being connected with second switch complete the detection of the scrubbing brush insert state, from
And when can be not inserted into and (extract) detecting scrubbing brush, pwm signal is closed, i.e., so that pwm signal is high level, makes dust catcher
The scrubbing brush pluggable terminals of scrubbing brush driving device do not continue band high voltage, therefore safety, circuit board are low in energy consumption, in addition anti-without increasing
Interface is presented, therefore design is simple, easily assembled, at low cost, harness is few.
Fig. 6 is the circuit diagram according to the scrubbing brush driving device of the dust catcher of the utility model another embodiment.Such as Fig. 6 institute
Show, on the basis of embodiment shown in Fig. 1, drive module 14 includes: the third switching tube Q2 being connected with the first output end 11；The
17 resistance R11, the first end of the 17th resistance R11 are connected with PWM input terminal 13；18th resistance R8, the 18th resistance R8
First end be connected with power vd D, the second end of the 18th resistance R8 is connected with the second end of the 17th resistance R11；12nd
Driving tube Q5, the control terminal of the 12nd driving tube Q5 are connected with the second end of the 17th resistance R11；20th resistance R1, second
The first end of ten resistance R1 is connected with power supply VCC；The first end and power supply VCC of 21st resistance R2, the 21st resistance R2
It is connected；The control terminal of 13rd driving tube Q1, the 13rd driving tube Q1 are connected with the second end of the 20th resistance R1, and the 13rd drives
The first end of dynamic pipe Q1 is connected with the second end of the 21st resistance R2；14th driving tube Q4, the control of the 14th driving tube Q4
End processed is connected with the second end of the 20th resistance R1, the first end of the 14th driving tube Q4 and the second end of the 13rd driving tube Q1
It is connected, the second end ground connection of the 14th driving tube Q4；22nd resistance R6, the first end and the 13rd of the 22nd resistance R6
The second end of driving tube Q1 is connected, and the second end of the 22nd resistance R6 is connected with the control terminal of third switching tube Q2.
Wherein, the utility model embodiment detection module 15 includes: the first detection sub-module, the first detection sub-module and the
One output end is connected, for generating the first testing result；Second detection sub-module, the second detection sub-module and second output terminal phase
Even, for generating the second testing result；Decision submodule, for generating scrubbing brush according to the first testing result and the second testing result
Insert state testing result.
Wherein, the scrubbing brush driving device of the utility model embodiment further include: it is defeated to be connected to the first output end 11 and second
The 4th diode D2 between outlet 12.
Wherein, the first detection sub-module includes: the 5th diode D1, the cathode of the 5th diode D1 and the first output end phase
Even；The first end of 23rd resistance R3, the 23rd resistance R3 are connected with power vd D；24th resistance R5, the 24th
The first end of resistance R5 is connected with the second end of the 23rd resistance R3；The of 25th resistance R7, the 25th resistance R7
One end is connected with the second end of the 24th resistance R5, the second end ground connection of the 25th resistance R7；26th resistance R4, the
The first end of 26 resistance is connected with power vd D；15th driving tube Q3, the control terminal and the 20th of the 15th driving tube Q3
The second end of four resistance R5 is connected, and the first end of the 15th driving tube Q3 is connected with the second end of the 26th resistance R4, and the tenth
The second end of five driving tube Q3 is grounded, wherein the second end of the 26th resistance R4 is the output end 17 of the first detection sub-module.
Wherein, the second detection sub-module includes: that the second sampling resistor R16, the second sampling resistor R16 is opened for detecting third
It closes the electric current of pipe Q2 and generates sample rate current；Second operational amplifier U1A, second operational amplifier U1A and the second sampling resistor
R16 is connected, for amplifying to sample rate current, wherein generates the second testing result according to sample rate current.
Wherein, the second detection sub-module further include: second filter (the RC filtering constituted including resistance R14 and capacitor C3
Device), second filter is connected with second operational amplifier U1A, for being filtered to amplified sample rate current.
Wherein, Vbat+ is cell voltage, and GND is ground connection, and J1 is earth brush motor module.
The working principle of the scrubbing brush driving device of the dust catcher of embodiment illustrated in fig. 6 is as shown in table 3: when PWM input terminal 13
When for high level, the 12nd driving tube Q5 conducting, the 13rd driving tube Q1 is not turned on, the 14th driving tube Q4 conducting, therefore the
Three switching tube Q2 are not turned on.When PWM input terminal 13 is low level, the 12nd driving tube Q5 is not turned on, the 13rd driving tube Q1
Conducting, the 14th driving tube Q4 are not turned on, therefore third switching tube Q2 is connected.
After scrubbing brush insertion, resistance very little between the first output end 11 and second output terminal 12 is equivalent to access.Work as scrubbing brush
It is open circuit between the first output end 11 and second output terminal 12 when being not inserted into and (extracting).
Therefore, after scrubbing brush is inserted into, when PWM input terminal 13 is high level, Q2 is not turned on, and Q3 is not turned on, the first detection
The output end 17 of submodule is high level, only has Weak current by the second sampling resistor R16, so amplified second detection
Submodule obtains electric current very little；When PWM input terminal 13 is low level, Q2 conducting, Q3 conducting, the output end of the first detection sub-module
17 be low level, has operating current by the second sampling resistor R16, sample rate current amplifies several times by operational amplifier U1A, so
It is filtered by wave filter, the second detection sub-module high current stable after being amplified.
When scrubbing brush is not inserted into and (extracts), and PWM input terminal 13 is high level or low level, the 15th driving tube Q3
Conducting, the output end 17 of the first detection sub-module are low level；Only have Weak current by the second sampling resistor R16 to pass through, adopt
Sample electric current amplifies by second operational amplifier U1A, then filters by second filter, and the second detection sub-module is stablized
Low current.
The working principle of the scrubbing brush driving device of 3 dust catcher of table
Based on above-mentioned working principle, scrubbing brush insert state is detected according to the second testing result, and extract in detection scrubbing brush
When, it detects whether scrubbing brush is inserted into according to the first testing result, to realize the detection to scrubbing brush insert state, and is detecting ground
When brush is extracted, pwm signal is closed, i.e., so that pwm signal is high level, so that the scrubbing brush of the scrubbing brush driving device of dust catcher
Pluggable terminals do not continue band high voltage, therefore safety, circuit board are low in energy consumption.
Fig. 7 is the flow chart of the scrubbing brush control method of the scrubbing brush driving device based on dust catcher shown in fig. 6.
As shown in fig. 7, the scrubbing brush control method includes:
S301: start to discharge.
S302: output scrubbing brush pwm signal (PWM input terminal 13 has control pulse).
S303: detecting state is pulled out into scrubbing brush.
S304: judge whether the second detection sub-module of scrubbing brush current signal continues to be less than A in X seconds.
Detecting state is pulled out if it is not, then returning to S303 and entering scrubbing brush；If so, entering step S305.
S305: judging that result is pulled out for scrubbing brush, closes scrubbing brush pwm signal (PWM input terminal 13 is high level).
S306: enter scrubbing brush and access detecting state.
S307: judge whether the output end 17 of the first detection sub-module continues X seconds high level.
If it is not, then returning to S306 reenters scrubbing brush access detecting state；If so, entering step S308.
S308: judging result for scrubbing brush insertion, and returning to S302 output scrubbing brush pwm signal, (PWM input terminal 13 has control arteries and veins
Punching).
The scrubbing brush driving device of the utility model embodiment, PWM input terminal receive pwm signal, the first output end and second
Drive module between output end generates driving signal according to pwm signal, and driving signal is exported to first output end
And second output terminal, the detection module being connected with the first output and second output terminal complete the detection of the scrubbing brush insert state,
So as to close pwm signal when detecting that scrubbing brush is not inserted into and (extracts), i.e., so that pwm signal is high level, make dust catcher
The scrubbing brush pluggable terminals of scrubbing brush driving device do not continue band high voltage, therefore safety, circuit board are low in energy consumption, in addition without increasing
Feedback interface, therefore design is simple, easily assembled, at low cost, harness is few.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples
Combination and combination.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (21)
1. a kind of scrubbing brush driving device of dust catcher characterized by comprising
First output end and second output terminal, first output end and second output terminal are connected with scrubbing brush；
PWM input terminal, for receiving pwm signal；
The drive module being connected between the PWM input terminal and first output end and second output terminal is used for basis
The pwm signal generates driving signal, and driving signal is exported to first output end and second output terminal；
Detection module, the detection module are connected with described first and/or second output terminal, for detecting the insertion of the scrubbing brush
State.
2. the scrubbing brush driving device of dust catcher as described in claim 1, which is characterized in that the drive module includes:
The first switch tube being connected with the second output terminal, for controlling the earth-return circuit on-off of the second output terminal；
The first order driven submodule being connected with the PWM input terminal；
The second level driven submodule being connected with the output end of the first order driven submodule, the second level driven submodule
Output end be connected with the control terminal of the first switch tube.
3. the scrubbing brush driving device of dust catcher as claimed in claim 2, which is characterized in that the first order driven submodule packet
It includes:
First resistor, the first end of the first resistor are connected with the PWM input terminal；
The first end of second resistance, the second resistance is connected with power supply；
The first end of first driving tube, first driving tube is connected with the second end of the second resistance, first driving
The second end of pipe is grounded, and the control terminal of first driving tube is connected with the second end of the first resistor, wherein described second
The second end of resistance is the output end of the first order driven submodule.
4. the scrubbing brush driving device of dust catcher as claimed in claim 2, which is characterized in that the second level driven submodule packet
It includes:
The first end of 3rd resistor, the 3rd resistor is connected with power supply；
Second driving tube, the control terminal of second driving tube is connected with the output end of the first order driven submodule, described
The first end of second driving tube is connected with the second end of the 3rd resistor, the second end ground connection of second driving tube；
The first end of 4th resistance, the 4th resistance is connected with the power supply；
The control terminal of third driving tube, the third driving tube is connected with the second end of the 3rd resistor, the third driving
The first end of pipe is connected with the second end of the 4th resistance；
The control terminal of 4th driving tube, the 4th driving tube is connected with the second end of the 3rd resistor, the 4th driving
The first end of pipe is connected with the second end of the third driving tube, the second end ground connection of the 4th driving tube；
The of 5th resistance, the first end of the 5th resistance and the second end of the third driving tube and the 4th driving tube
One end is connected, and the second end of the 5th resistance is connected with the control terminal of the first switch tube.
5. the scrubbing brush driving device of dust catcher as claimed in claim 2, which is characterized in that further include:
The first diode being connected between first output end and second output terminal.
6. the scrubbing brush driving device of dust catcher as claimed in claim 2, which is characterized in that further include:
Enabled module, controls the detection module for receiving enable signal, and according to the enable signal.
7. the scrubbing brush driving device of dust catcher as claimed in claim 6, which is characterized in that the detection module includes:
The anode of second diode, second diode is connected with the second output terminal；
The first end of 5th driving tube, the 5th driving tube is connected with the cathode of second diode, the 5th driving
The control terminal of pipe is connected with the enabled module；
The first end of 6th resistance, the 6th resistance is connected with power supply；
The first end of 7th resistance, the 7th resistance is connected with the second end of the 5th driving tube；
The control terminal of 6th driving tube, the 6th driving tube is connected with the second end of the 7th resistance, the 6th driving
The first end of pipe is connected with the second end of the 6th resistance, the second end ground connection of the 6th driving tube, wherein the described 6th
The first end of driving tube is scrubbing brush insert state test side.
8. the scrubbing brush driving device of dust catcher as claimed in claim 6, which is characterized in that the enabled module includes:
The first end of 8th resistance, the 8th resistance is connected with the enable signal；
The control terminal of 7th driving tube, the 7th driving tube is connected with the second end of the 8th resistance, the 7th driving
The first end of pipe is the output end of the enabled module, the second end ground connection of the 7th driving tube.
9. the scrubbing brush driving device of dust catcher as described in claim 1, which is characterized in that the drive module includes:
The second switch being connected with second output terminal；
The first order driver being connected with the PWM input terminal；
The second level driver being connected with the output end of the first order driver；
The third level driver being connected with the output end of the second level driver, the output end of the third level driver and institute
The control terminal for stating second switch is connected.
10. the scrubbing brush driving device of dust catcher as claimed in claim 9, which is characterized in that the first order driver includes:
The first end of 9th resistance, the 9th resistance is connected with power supply；
The first end of tenth resistance, the tenth resistance is connected with the PWM input terminal；
The control terminal of 8th driving tube, the 8th driving tube is connected with the second end of the tenth resistance, the 8th driving
The first end of pipe is connected with the second end of the 9th resistance；
Eleventh resistor, the first end of the eleventh resistor are connected with the second end of the 8th driving tube, and the described 11st
The second end of resistance is grounded, wherein the first end of the eleventh resistor is the output end of the first order driver.
11. the scrubbing brush driving device of dust catcher as claimed in claim 9, which is characterized in that the second level driver includes:
The first end of twelfth resistor, the twelfth resistor is connected with power supply；
Thirteenth resistor, the first end of the thirteenth resistor are connected with the second end of the twelfth resistor；
The control terminal of 9th driving tube, the 9th driving tube is connected with the output end of the first order driver, and the described 9th
The first end of driving tube is connected with the second end of the thirteenth resistor, the second end ground connection of the 9th driving tube；
The control terminal of tenth driving tube, the tenth driving tube is connected with the second end of the twelfth resistor, and the described tenth drives
The first end of dynamic pipe is connected with the power supply,
The first end of 14th resistance, the 14th resistance is connected with the second end of the tenth driving tube；
The first end of 15th resistance, the 15th resistance is connected with the second end of the 14th resistance, and the described 15th
The second end of resistance is grounded, wherein the second end of the 14th resistance is the output end of the second level driver.
12. the scrubbing brush driving device of dust catcher as claimed in claim 9, which is characterized in that the third level driver includes:
Third diode, the anode of the third diode are connected with the output end of the second level driver；
The control terminal of 11st driving tube, the 11st driving tube is connected with the output end of the second level driver, described
The first end of 11st driving tube is connected with the cathode of the third diode, the second end ground connection of the 11st driving tube；
The first end of 16th resistance, the 16th resistance is connected with the cathode of the third diode, the 16th electricity
The second end of resistance is grounded, wherein the cathode of the third diode is the output end and described second of the third level driver
The control terminal of switching tube is connected.
13. the scrubbing brush driving device of dust catcher as claimed in claim 9, which is characterized in that further include:
The 4th diode being connected between first output end and second output terminal.
14. the scrubbing brush driving device of dust catcher as claimed in claim 9, which is characterized in that the detection module includes:
First sampling resistor, first sampling resistor are used to detect the electric current of the second switch and generate sample rate current；
First operational amplifier, first operational amplifier are connected with first sampling resistor, for the sampling electricity
Stream amplifies, wherein generates scrubbing brush insert state testing result according to the sample rate current.
15. the scrubbing brush driving device of dust catcher as claimed in claim 14, which is characterized in that the detection module further include:
First filter, the first filter are connected with first operational amplifier, for amplified sample rate current
It is filtered.
16. the scrubbing brush driving device of dust catcher as described in claim 1, which is characterized in that the drive module includes:
The third switching tube being connected with first output end；
The first end of 17th resistance, the 17th resistance is connected with the PWM input terminal；
The first end of 18th resistance, the 18th resistance is connected with power supply, the second end of the 18th resistance with it is described
The second end of 17th resistance is connected；
The control terminal of 12nd driving tube, the 12nd driving tube is connected with the second end of the 17th resistance；
The first end of 20th resistance, the 20th resistance is connected with the power supply；
The first end of 21st resistance, the 21st resistance is connected with the power supply；
The control terminal of 13rd driving tube, the 13rd driving tube is connected with the second end of the 20th resistance, and described
The first end of 13 driving tubes is connected with the second end of the 21st resistance；
The control terminal of 14th driving tube, the 14th driving tube is connected with the second end of the 20th resistance, and described
The first end of 14 driving tubes is connected with the second end of the 13rd driving tube, the second termination of the 14th driving tube
Ground；
The first end of 22nd resistance, the 22nd resistance is connected with the second end of the 13rd driving tube, described
The second end of 22nd resistance is connected with the control terminal of the third switching tube.
17. the scrubbing brush driving device of dust catcher as claimed in claim 16, which is characterized in that the detection module includes:
First detection sub-module, first detection sub-module are connected with first output end, for generating the first detection knot
Fruit；
Second detection sub-module, second detection sub-module are connected with the second output terminal, for generating the second detection knot
Fruit；
Decision submodule, for generating scrubbing brush insert state detection knot according to first testing result and the second testing result
Fruit.
18. the scrubbing brush driving device of dust catcher as claimed in claim 16, which is characterized in that further include:
The 5th diode being connected between first output end and second output terminal.
19. the scrubbing brush driving device of dust catcher as claimed in claim 17, which is characterized in that the first detection sub-module packet
It includes:
The cathode of 6th diode, the 6th diode is connected with first output end；
The first end of 23rd resistance, the 23rd resistance is connected with the power supply；
The first end of 24th resistance, the 24th resistance is connected with the second end of the 23rd resistance；
The first end of 25th resistance, the 25th resistance is connected with the second end of the 24th resistance, and described second
The second end of 15 resistance is grounded；
The first end of 26th resistance, the 26th resistance is connected with the power supply；
The control terminal of 15th driving tube, the 15th driving tube is connected with the second end of the 24th resistance, described
The first end of 15th driving tube is connected with the second end of the 26th resistance, the second termination of the 15th driving tube
Ground, wherein the second end of the 26th resistance is the output end of first detection sub-module.
20. the scrubbing brush driving device of dust catcher as claimed in claim 17, which is characterized in that the second detection sub-module packet
It includes:
Second sampling resistor, second sampling resistor are used to detect the electric current of the third switching tube and generate sample rate current；
Second operational amplifier, the second operational amplifier are connected with second sampling resistor, for the sampling electricity
Stream amplifies, wherein generates second testing result according to the sample rate current.
21. the scrubbing brush driving device of dust catcher as claimed in claim 20, which is characterized in that second detection sub-module is also
Include:
Second filter, the second filter are connected with the second operational amplifier, for amplified sample rate current
It is filtered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235728.2U CN209003821U (en) | 2018-08-02 | 2018-08-02 | The scrubbing brush driving device of dust catcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821235728.2U CN209003821U (en) | 2018-08-02 | 2018-08-02 | The scrubbing brush driving device of dust catcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209003821U true CN209003821U (en) | 2019-06-21 |
Family
ID=66830703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821235728.2U Active CN209003821U (en) | 2018-08-02 | 2018-08-02 | The scrubbing brush driving device of dust catcher |
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| Country | Link |
|---|---|
| CN (1) | CN209003821U (en) |
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2018
- 2018-08-02 CN CN201821235728.2U patent/CN209003821U/en active Active
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