CN208428112U - A kind of protective cover and angle grinder - Google Patents
A kind of protective cover and angle grinder Download PDFInfo
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- CN208428112U CN208428112U CN201820123624.6U CN201820123624U CN208428112U CN 208428112 U CN208428112 U CN 208428112U CN 201820123624 U CN201820123624 U CN 201820123624U CN 208428112 U CN208428112 U CN 208428112U
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- angle grinder
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Abstract
The utility model relates to field of power tools, disclose a kind of protective cover and angle grinder, wherein, protective cover includes: shield, the first recognition unit being arranged on shield and human body sensing unit and the first wireless communication unit and control unit, first recognition unit by angle grinder for being identified, so that angle grinder confirmation shield is correctly installed on angle grinder；Whether human body sensing unit has human body bio signal in the default job area of the grinding wheel of angle grinder for incuding；Control unit is connect with human body sensing unit, the first wireless communication unit, control unit controls the first wireless communication unit and sends angle grinder for alarm signal for generating alarm signal when human body sensing unit, which is sensed, has human body bio signal in the default job area of the grinding wheel of angle grinder.By the above-mentioned means, the utility model can be realized motor brake control and the security alarm of angle grinder, the intelligent safety protection of angle grinder is realized.
Description
Technical field
The utility model embodiment is related to field of power tools, more particularly to a kind of protective cover and angle grinder.
Background technique
Angle grinder, also known as grinder or disc mill are a kind of grinding tools for cutting and polishing for glass reinforced plastic.Angle grinder is one
Kind using glass reinforced plastic cut and polish portable electric tool, be mainly used for cutting, grinding or brushing metal and stone material etc..By
It is easy to cause personal safety to injure user in angle grinder, therefore the importance of shield is self-evident.
Most of angle grinder is often without configuration safty shield in the prior art, and the safety of part angle grinder configuration is anti-
Shield often performs practically no function, and user is not mostly by regulation installation or proper use of shield, the frequent generation to cause the accident.And
And when grinding wheel of the human body close to angle grinder, motor does not brake control function, be easy to cause accident.
Utility model people in the process of implementing the utility model, discovery the relevant technologies are the prior art has at least the following problems: grind by angle
The safty shield of machine does not have intelligent safety protection function.
Utility model content
The utility model embodiment provides a kind of protective cover and angle grinder, and the safety for solving prior art angle grinder is anti-
Shield does not have the technical issues of intelligent safety protection function.
In order to solve the above-mentioned technical problem, the utility model embodiment the following technical schemes are provided:
In a first aspect, the utility model embodiment provides a kind of protective cover, it is applied to angle grinder, comprising:
Shield；
First recognition unit is arranged on the shield, for being identified by the angle grinder, so that the angle grinder is true
Recognize the shield and is correctly installed on the angle grinder；
Human body sensing unit is arranged on the shield, and the pre- of grinding wheel for incuding in the angle grinder is provided as
Whether human body bio signal is had within the scope of industry；
First wireless communication unit；
Control unit, described control unit are connect with the human body sensing unit, the first wireless communication unit, the control
Unit is used to sense have human body raw in the default job area of the grinding wheel of the angle grinder in the human body sensing unit
Alarm signal is generated when object signal, and is controlled first wireless communication unit and sent the angle mill for the alarm signal
Machine.
In some embodiments, above-mentioned human body sensing unit be it is multiple, be distributed on the shield, any one or it is more
A human body sensing unit senses when having human body bio signal in the default job area of the grinding wheel of the angle grinder,
Described control unit controls first wireless communication unit, sends the alarm signal to the angle grinder.
In some embodiments, above-mentioned protective cover further include:
Power module connects the human body sensing unit, the first wireless communication unit and described control unit, for for
The protective cover provides power supply.
In some embodiments, above-mentioned power module includes battery.
In some embodiments, above-mentioned control unit includes: logical-arithmetic unit, and the logical-arithmetic unit is described for handling
The trigger signal that human body sensing unit generates, in the touching for receiving any one or more human body sensing units generations
It is waken up generation alarm signal when signalling, and wakes up first wireless communication unit, makes first wireless communication unit
The alarm signal is sent to the angle grinder.
Second aspect, the utility model embodiment provide a kind of angle grinder, including above-mentioned protective cover, the angle grinder
Further include:
Second recognition unit, for generating angle grinder enabling signal when recognizing first recognition unit；
Second wireless communication unit is wirelessly connected first wireless communication unit, for receiving first channel radio
Believe the alarm signal that unit is sent；
Driving motor, the driving motor is for driving the grinding wheel of the angle grinder to rotate；
Switch, for opening or closing the driving motor；
Master controller, the master controller are electric with second recognition unit, the second wireless communication unit, driving respectively
Machine, switch connection, the master controller are used to control the switch according to the angle grinder enabling signal and be in effective status,
So that user can open the driving motor by the switch, the master controller is also used to according to second channel radio
Believe the received alarm signal of unit, controls the driving motor and stop working.
In some embodiments, above-mentioned angle grinder further include: alarm unit, the master controller and the alarm unit connect
It connects, the master controller is used to control the alarm unit according to the received alarm signal of the second wireless communication unit and mention
Awake user takes care.
In some embodiments, above-mentioned angle grinder further include: drive control unit, the master controller and the driving are controlled
Unit connection processed, the master controller are used to control the operation of the driving motor by the drive control unit.
In some embodiments, above-mentioned angle grinder further include: motor speed detection unit, for detecting the grinding wheel
Revolving speed.
In some embodiments, the master controller is also used to the institute detected according to the motor speed detection unit
The revolving speed and received alarm signal, progress brake control for stating grinding wheel pass through the drive control unit and control institute
State the revolving speed of driving motor.
The beneficial effect of the utility model embodiment is: being in contrast to the prior art, the utility model embodiment is logical
It crosses whether detection shield is correctly installed, and whether has in the default job area of grinding wheel by the induction of human body sensing unit
Human-body biological signal sends alarm signal to angle grinder.By the above-mentioned means, the utility model embodiment can be realized angle grinder
Intelligent safety protection.
Detailed description of the invention
One or more embodiments are illustrated by corresponding attached drawing, these exemplary illustrations not structure
The restriction of pairs of embodiment, the element with same reference numbers label is expressed as similar element in attached drawing, unless there are special
It declares, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of the functional block diagram of the utility model protective cover that wherein an embodiment provides；
Fig. 2 is a kind of the functional block diagram for protective cover that another embodiment of the utility model provides；
Fig. 3 is a kind of the functional block diagram for protective cover that the utility model another embodiment provides；
Fig. 4 is a kind of the functional block diagram of the utility model angle grinder that wherein an embodiment provides；
Fig. 5 is the electrical block diagram of driving circuit provided by the embodiment of the utility model.
Referring to Fig. 1 to Fig. 5,100 be angle grinder；10 be protective cover；11 be shield；111 be the first recognition unit；
112 be human body sensing unit；113 be the first wireless communication unit；114 be control unit；1141 be logical-arithmetic unit；115 are
Power module；20 be master controller；30 be the second wireless communication unit；40 be the second recognition unit；50 be switch；60 be driving
Motor；61 be motor speed detection unit；70 be drive control unit；71 be driving circuit；80 be alarm unit.
Specific embodiment
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.It should be noted that it can be directly in another element when element is expressed " being fixed on " another element
Upper or placed in the middle there may be one or more therebetween elements.When an element is expressed " connection " another element, it can
To be directly to another element or elements placed in the middle there may be one or more therebetween.This specification is used
Term "vertical", "horizontal", "left" and "right" and similar statement for illustrative purposes only.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Term used in the description of the utility model is intended merely to
The purpose for describing specific embodiment is not intended to limitation the utility model.Term "and/or" used in this specification includes
Any and all combinations of one or more related listed items.
Referring to Fig. 1, a kind of the utility model protective cover 10 that wherein an embodiment provides, comprising: shield 11,
First recognition unit 111, human body sensing unit 112, the first wireless communication unit 113, control unit 114.
Specifically, first recognition unit 111 can be one block of small magnet steel, one piece of small iron plate or be an electronic tag
Device is firmly installed or is embedded on shield 11, it is to be understood that first recognition unit 111 should be installed
Or in insertion in place, so that angle grinder can rapidly and accurately identify first recognition unit 111.Preferably,
First recognition unit 111 is small magnet steel.First recognition unit 111 is for realizing angle grinder automatic identification or detection institute
State whether shield 11 is installed or be properly attached in angle grinder.If the shield 11 is not installed in angle grinder, or
Person, the shield 11 are not properly mounted in angle grinder, then angle grinder will test less than first recognition unit 111,
The determination shield 11 is not installed in angle grinder by angle grinder at this time, and the switch in angle grinder is in failure shape at this time
State, angle grinder will not work.
Specifically, the human body sensing unit 112 is human body infrared detector, the human body infrared detector is that one kind is
Low-power consumption type, the human body infrared inductor of power consumption very little.
The human body sensing unit 112 can be one or more, wherein multiple human body sensing units 112 are installed in
On shield 11, it is to be understood that the induction range of the human body sensing unit 112 should cover the grinding wheel of angle grinder
Operating area, when one or more human body sensing units 112 sense human-body biological signal, control unit 114 controls described
First wireless communication unit 113 sends alarm signal and gives angle grinder master controller.If angle grinder is in running order at this time, angle mill
The master controller of machine is responding at the first time after receiving alarm signal, is forbidding driving motor runs, and make
Motor brake control processing, makes driving motor stop operating, and enters invalid state.Meanwhile the alarm unit report in angle grinder
Police is to remind user to take care；If angle grinder is in normal off position at this time, the starting in angle grinder is opened at this time
Failure state will be in by closing, and angle grinder enters invalid state.
Wherein, first wireless communication unit 113 is mounted on the shield 11, and human body sensing unit 112 generates
Wake-up signal of the trigger signal as control unit 114, when human body sensing unit 112 has sensed human body bio signal,
Trigger signal will be generated and trigger described control unit 114, control unit 114 generates corresponding alarm signal and wakes up the first nothing
Line communication unit 113, first wireless communication unit 113 will send incessantly the alarm signal to angle with certain frequency
Grinding machine.For example, can send alarm signal to angle grinder every several hundred milliseconds, the master controller of angle grinder will receive and process institute
Alarm signal is stated, until human body sensing unit 112 can't detect human-body biological signal.
Referring to Fig. 2, in another embodiment, the protective cover 10 further includes power module 115；Wherein, described
Power module 115 connects first wireless communication unit 113, control unit 114 and human body sensing unit 112, the electricity
Source module 115, for powering to the protective cover 10.
Above-mentioned power module 115 includes battery.Preferably, the battery can be rechargeable battery, conveniently recycle,
It economizes on resources.The power module 115 is used to provide power supply for the protective cover 10.The human body sensing unit 112 is
The infrared human body inductor of a kind of low-power consumption type, power consumption very little, can save electric energy.Meanwhile when human body sensing unit 112 does not have
When sensing human-body biological signal, human body sensing unit 112 and control unit 114 will enter suspend mode simultaneously at this time, this
When human body sensing unit 112 and control unit 114 be in low power consumpting state, electric energy can be further saved.Pass through above-mentioned side
Formula can make the power consumption of protective cover very small, so that battery powered cruise duration is elongated.
Referring again to Fig. 3, in some embodiments, above-mentioned control unit 114 includes: logical-arithmetic unit 1141, wherein institute
Stating logical-arithmetic unit 1141 is logical "or" arithmetic unit, when one or more human body sensing units 112 sense that human-body biological is believed
Number when, the human body sensing unit 112 will generate trigger signal, and the trigger signal will trigger and wake up the logical-arithmetic unit
1141, the logical-arithmetic unit 1141 generates alarm signal, and the alarm signal is exported to first wireless communication unit
113, first wireless communication unit 113 is waken up, and alarm signal is sent to angle grinder master controller.
In the utility model embodiment, the first recognition unit is identified by angle grinder, and whether judge protective cover
Installation or correct installation, and human-body biological signal is incuded by human body sensing unit, and send out by the first wireless communication unit
It send alarm signal to angle grinder, controls the work of angle grinder.By the above-mentioned means, the utility model embodiment can be realized angle mill
The intelligent safety protection of machine.
Referring to Fig. 4, a kind of the utility model angle grinder 100 that wherein an embodiment provides, comprising: master controller 20,
Second wireless communication unit 30, the second recognition unit 40, switch 50, driving motor 60, drive control unit 70, alarm unit 80
And protective cover 10 provided by the above embodiment.
The protective cover 10 may be mounted in angle grinder 100.
Wherein, second recognition unit 40, the first recognition unit 111 on above-mentioned protective cover 10 for identification,
Realize whether automatic identification or detection shield 11 are installed or be properly attached in angle grinder 100.Wherein, second identification is single
Member 40 can be Hall sensor, close to switch or RFI D card reader etc..Preferably, second recognition unit 40 is suddenly
That sensor, corresponds to the small magnet steel in above-described embodiment, for identification the small magnet steel.For example, when the shield 11 does not have
When installing or be not properly mounted in angle grinder 100, such as: the protective cover 10 is mounted on the position in angle grinder 100
It is big or apart from remote to set deviation, causes the Hall sensor to can't detect the small magnet steel on the shield 11, at this time angle grinder
100, which will be considered to the shield 11, is fitted without, and switch 50 enters invalid state at this time, and angle grinder 100 will be unable to work normally.
When the second recognition unit 40 in angle grinder 100 recognizes the first recognition unit 111 on protective cover 10,
Angle grinder 100 will generate angle grinder enabling signal；If the master controller 20 of angle grinder 100 receives angle grinder enabling signal,
Determine that the shield 11 has been installed and has correctly been installed on the angle grinder 100.Such as: the second identification in the angle grinder
Unit 40 can be Hall sensor, and the first recognition unit 111 on the shield 11 can be small magnet steel, when the Hall
When sensor detects small magnet steel, it will confirm that the shield 11 has correctly been installed on the angle grinder 100.
Specifically, the master controller 20 is used to control the work of angle grinder 100, the master controller 20 can receive and
Alarm signal transmitted by above-mentioned first wireless communication unit 113 is handled, while the master controller 20 can be with described first
Wireless communication unit 113 carries out wireless communication, and can carry out data exchange between the two.
Specifically, second wireless communication unit 30 can be radio-frequency module, bluetooth module, WiFi module, NFC communication
Module etc., first wireless communication unit 113 corresponding with second wireless communication unit 30 or radio-frequency module, bluetooth
Module, NFC communication module etc..It is understood that first wireless communication unit 113 and the second wireless communication unit 30
Type should be identical, and the two is facilitated to carry out wireless communication.Wherein, second wireless communication unit 30 is for receiving described first
The wireless signal that wireless communication unit 113 is sent, such as alarm signal, the master controller 20 are diagonal according to the alarm signal
Grinding machine 100 is controlled, such as: if the master controller 20 receives the alarm that first wireless communication unit 113 is sent
Signal, then master controller 20 controls angle grinder 100 and stops working and enter invalid state.
Specifically, the driving motor 60, for driving the grinding wheel of angle grinder 100 to rotate.The driving motor 60 can
To be controlled by switch 50.The switch 50, for opening driving motor 60 or closing driving motor 60, the switch 50 can be with
It is controlled by master controller 20, there are two types of state, effective status and invalid states for the switch 50.Have when the switch 50 is in
When effect state, user can open driving motor 60 by the switch 50, and angle grinder 100 is made to work；When the switch 50
When in invalid state, user will be unable to open driving motor 60, and angle grinder 100 can not work.
Specifically, when user does not start angle grinder 100, if human body sensing unit 112 does not sense human body at this time
Bio signal, then the logical-arithmetic unit 1141 on protective cover 10 and the first wireless communication unit 113 are in suspend mode,
Under suspend mode, logical-arithmetic unit 1141 and the first wireless communication unit 113 are in low power consumpting state, to save electric energy；When
When human body sensing unit 112 senses human-body biological signal, logical-arithmetic unit 1141 will be waken up generation alarm signal at this time, patrol
It collects arithmetic unit 1141 and then wakes up the first wireless communication unit 113, logical-arithmetic unit 1141 and the first wireless communication unit 113 will
In running order, the first wireless communication unit 113 will send the alarm signal to the master controller 20 of angle grinder 100, master control
Device 20 processed is in failure state according to the switch 50 that alarm signal controls angle grinder 100, and angle grinder 100 is unable to operate normally.
Specifically, the alarm unit 80 can be buzzer, indicator light, alarm lamp or vibrator.
Referring again to Fig. 5, Fig. 5 is the electrical block diagram of driving circuit provided by the embodiment of the utility model.Driving
Control unit 70 includes driving circuit 71, which is inverter bridge, and output end connects driving motor 60, to adjust it
Revolving speed.Angle grinder 100 further includes motor speed detection unit 61, and the motor speed detection unit 61 can be examined for motor speed
Instrument is surveyed, the motor speed detection unit 61 is used to detect the revolving speed of grinding wheel, and by the speed feedback of the grinding wheel to angle
The master controller 20 of grinding machine 100.Wherein, the master controller 20 is also used to be detected according to the motor speed detection unit 61
Grinding wheel revolving speed and received alarm signal, carry out brake control, controlled by drive control unit 70 described
The revolving speed of driving motor 60.
Specifically, the driving circuit 71 can be H-bridge drive circuit, the H-bridge drive circuit includes 4 triodes,
Respectively Q1, Q2, Q3 and Q4.The driving motor 60 is operated, then must be connected on the H-bridge drive circuit diagonal line
A pair of of triode, such as: triode Q1 and triode Q2 or triode Q3 and triode Q4.When the human body sensing list
When member 112 senses human-body biological signal, after the master controller 20 in angle grinder 100 receives alarm signal, in conjunction with current electricity
The revolving speed for the grinding wheel that machine rotation speed detection unit 61 detects does brake control.Specifically, it is assumed that driving motor 60 be by
According to rotationally clockwise, the Q1 and Q2 of H-bridge drive circuit are the opening states of the modulation in PWM, and Q3 and Q4 are to be in
Closed state；When needing to carry out brake control, the master controller 20 of angle grinder 100 is according to the revolving speed of current driving motor 60
The duty ratio for providing suitable PWM is in close state the Q1 of H-bridge drive circuit and Q2 immediately, and Q3 and Q4 are in PWM
The opening state of modulation makes H bridge driving electricity when the revolving speed of driving motor 60 drops to the value of the setting of angle grinder master controller 20
The Q1 and Q3 on road are in close state immediately, and all down tube Q2 and Q4 of H-bridge drive circuit are shown in a fully open operation, until driving motor
60 stop operating, and close all power tubes of H-bridge drive circuit, and entire 60 brake process of driving motor is completed.
In the utility model embodiment, by detecting the revolving speed of driving motor, when human body sensing unit senses human body
When bio signal, angle grinder master controller carries out brake control to driving motor, and reminds user's note by alarm unit
Meaning safe handling specification.By the above-mentioned means, the utility model embodiment can be realized intelligent safety protection, reduces user and use
It is injured caused by improper.
It should be noted that giving the preferable implementation of the utility model in the specification and its attached drawing of the utility model
Example, still, the utility model can be realized by many different forms, however it is not limited to which this specification is described to be implemented
Example, not as the additional limitation to the content of the present invention, purpose of providing these embodiments is makes to this reality these embodiments
Understanding with novel disclosure is more thorough and comprehensive.Also, above-mentioned each technical characteristic continues to be combined with each other, and is formed not upper
The various embodiments that face is enumerated are accordingly to be regarded as the range of the utility model specification record；Further, to ordinary skill
For personnel, it can be modified or changed according to the above description, and all to should belong to this practical new for all these modifications and variations
The protection scope of type appended claims.
Claims (10)
1. a kind of protective cover is applied to angle grinder characterized by comprising
Shield；
First recognition unit is arranged on the shield, for being identified by the angle grinder, so that the angle grinder confirms institute
It states shield and is correctly installed on the angle grinder；
Human body sensing unit is arranged on the shield, for incuding the default operation model in the grinding wheel of the angle grinder
Whether there is human body bio signal in enclosing；
First wireless communication unit；
Control unit, described control unit are connect with the human body sensing unit, the first wireless communication unit, described control unit
For sensing there is human-body biological letter in the default job area of the grinding wheel of the angle grinder in the human body sensing unit
Number when generate alarm signal, and control first wireless communication unit and send the angle grinder for the alarm signal.
2. protective cover according to claim 1, which is characterized in that the human body sensing unit be it is multiple, be distributed in
On the shield, any one or more human body sensing units are sensed to be provided as in the pre- of grinding wheel of the angle grinder
When having human body bio signal within the scope of industry, described control unit controls first wireless communication unit, sends the alarm signal
Number arrive the angle grinder.
3. protective cover according to claim 1, which is characterized in that the protective cover further include:
Power module is separately connected the human body sensing unit, the first wireless communication unit and described control unit, for for
The protective cover provides power supply.
4. protective cover according to claim 3, which is characterized in that the power module includes battery.
5. protective cover according to claim 1, which is characterized in that described control unit includes: logical-arithmetic unit, institute
State the trigger signal that logical-arithmetic unit is generated for handling the human body sensing unit, for receive it is any one or more
It is waken up generation alarm signal when the trigger signal that the human body sensing unit generates, and it is single to wake up first wireless communication
Member makes first wireless communication unit send the alarm signal to the angle grinder.
6. a kind of angle grinder, which is characterized in that including the described in any item protective covers of claim 1-5, the angle grinder
Further include:
Second recognition unit, for generating angle grinder enabling signal when recognizing first recognition unit；
Second wireless communication unit is wirelessly connected first wireless communication unit, single for receiving first wireless communication
The alarm signal that member is sent；
Driving motor, the driving motor is for driving the grinding wheel of the angle grinder to rotate；
Switch, for opening or closing the driving motor；
Master controller, the master controller respectively with second recognition unit, the second wireless communication unit, driving motor, open
Connection connects, and the master controller is used to control the switch according to the angle grinder enabling signal and be in effective status, to make
User can open the driving motor by the switch, and the master controller is also used to according to second wireless communication unit
Received alarm signal controls the driving motor and stops working.
7. angle grinder according to claim 6, which is characterized in that the angle grinder further include: alarm unit, the master control
Device processed is connect with the alarm unit, and the master controller is used for according to the received alarm signal of the second wireless communication unit
Number, it controls the alarm unit and user is reminded to take care.
8. angle grinder according to claim 6, which is characterized in that the angle grinder further include: drive control unit, it is described
Master controller is connect with the drive control unit, and the master controller is used to control the drive by the drive control unit
The operation of dynamic motor.
9. angle grinder according to claim 8, which is characterized in that the angle grinder further include: motor speed detection unit,
For detecting the revolving speed of the grinding wheel.
10. angle grinder according to claim 9, which is characterized in that the master controller is also used to be turned according to the motor
The revolving speed for the grinding wheel that fast detection unit detects and received alarm signal carry out brake control, pass through
The drive control unit controls the revolving speed of the driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820123624.6U CN208428112U (en) | 2018-01-24 | 2018-01-24 | A kind of protective cover and angle grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820123624.6U CN208428112U (en) | 2018-01-24 | 2018-01-24 | A kind of protective cover and angle grinder |
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| Publication Number | Publication Date |
|---|---|
| CN208428112U true CN208428112U (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820123624.6U Active CN208428112U (en) | 2018-01-24 | 2018-01-24 | A kind of protective cover and angle grinder |
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| CN (1) | CN208428112U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108081141A (en) * | 2018-01-24 | 2018-05-29 | 深圳和而泰智能控制股份有限公司 | A kind of protective cover and angle grinder |
-
2018
- 2018-01-24 CN CN201820123624.6U patent/CN208428112U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108081141A (en) * | 2018-01-24 | 2018-05-29 | 深圳和而泰智能控制股份有限公司 | A kind of protective cover and angle grinder |
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