CN108340250A - It grinds at angle - Google Patents
It grinds at angle Download PDFInfo
- Publication number
- CN108340250A CN108340250A CN201710053571.5A CN201710053571A CN108340250A CN 108340250 A CN108340250 A CN 108340250A CN 201710053571 A CN201710053571 A CN 201710053571A CN 108340250 A CN108340250 A CN 108340250A
- Authority
- CN
- China
- Prior art keywords
- calutron
- state
- motor
- power supply
- electric current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/028—Angle tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
- H02K7/1023—Magnetically influenced friction brakes using electromagnets
- H02K7/1025—Magnetically influenced friction brakes using electromagnets using axial electromagnets with generally annular air gap
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The invention discloses a kind of angle mills, including：Power supply, for providing electric energy；Motor, for converting the electric energy of power supply to mechanical energy output；Operation switch, for for user's operation, Operation switch to have the second state of turn-on power and the first state of motor being electrically connected and deenergization and motor being electrically connected；Brake apparatus is used for braking motor；Calutron, it is at least used to generate the magnetic field for being attracted brake apparatus, calutron have non-brake state and on-position, when Operation switch is in first state calutron in non-brake state and when Operation switch is in the second state, calutron is in on-position；Signal device, for making calutron with the first magnetic field of the first electric current generation actuation brake apparatus when Operation switch is in first state；Calutron is set to generate the second magnetic field for being attracted brake apparatus with the second electric current again, the current value of the second electric current is less than the current value of the first electric current.Angle mill energy fast braking avoids injuring.
Description
Technical field
The present invention relates to angle mills, and in particular to a kind of angle mill with brake apparatus.
Background technology
Angle mill be polished workpiece, cut using high-speed rotating polishing pad, the tool of polishing.Due to polishing
Disk has higher rotary speed when being powered on, after a loss of power since its inertia motion is easy to defective work piece, it is also possible to
User is damaged.Therefore, polishing pad is needed by fast braking to prevent from injuring when power is off.
Invention content
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of, and the angle with brake apparatus is ground.
In order to realize that above-mentioned target, the present invention adopt the following technical scheme that：
A kind of angle mill, including：Power supply, for providing electric energy；Motor, it is defeated for converting the electric energy of the power supply to mechanical energy
Go out；Operation switch, for for user's operation, the Operation switch has the be electrically connected that the power supply and the motor is connected
One state and the second state being electrically connected for disconnecting the power supply and the motor；Brake apparatus, for braking the motor；Electricity
Magnetic device, is at least used to generate the magnetic field for being attracted the brake apparatus, and the calutron has non-brake state and braking shape
State, when the Operation switch is in first state, the calutron is in non-brake state in the Operation switch
The calutron is in on-position when the second state；Signal device, for when the Operation switch is in first state
The calutron is set to generate the first magnetic field for being attracted the brake apparatus with the first electric current；Make the calutron with second again
Electric current generates the second magnetic field for being attracted the brake apparatus, and the current value of second electric current is less than the electric current of first electric current
Value.
Further, the motor is series machine.
Further, the power supply is AC power.
Another angle mill, including：Power supply, for providing electric energy；Motor, for converting the electric energy of the power supply to machinery
It can output；Operation switch, for for user's operation, the Operation switch, which has, is connected being electrically connected for the power supply and the motor
First state and disconnect the second state being electrically connected of the power supply and the motor；Brake apparatus, for braking the electricity
Machine；Calutron is at least used to generate the magnetic field for being attracted the brake apparatus, and the calutron has non-brake state and system
Dynamic state, when the Operation switch is in first state, the calutron is in non-brake state and in the Operation switch
The calutron is in on-position when in the second state；Current regulator flows through the calutron for adjusting
Electric current is so that the calutron generates changing magnetic field；Controller, for when the Operation switch is in first state to
The current regulator sends the first signal so that the calutron is generated with the first electric current is attracted the of the brake apparatus
One magnetic field；Second signal is sent so that the calutron is with the second electric current to the current regulator again after preset time
The second magnetic field for being attracted the brake apparatus is generated, the current value of second electric current is less than the current value of first electric current.
Further, the motor is series machine.
Further, the current regulator is electronic switch or slide rheostat.
Another angle mill, including：Power supply, for providing electric energy；Motor, for converting the electric energy of the power supply to machinery
It can output；Operation switch, for for user's operation, the Operation switch, which has, is connected being electrically connected for the power supply and the motor
First state and disconnect the second state being electrically connected of the power supply and the motor；Brake apparatus, for braking the electricity
Machine；Calutron is at least used to generate the magnetic field for being attracted the brake apparatus, and the calutron has non-brake state and system
Dynamic state, when the Operation switch is in first state, the calutron is in non-brake state and in the Operation switch
The calutron is in on-position when in the second state；Current regulator flows through the calutron for adjusting
Electric current is so that the calutron generates changing magnetic field；Signal generating circuit, including capacitance and semiconductor element, in institute
It states and sends the first signal so that the calutron is with the first electricity to the current regulator when Operation switch is in first state
Raw the first magnetic field for being attracted the brake apparatus of miscarriage；After preset time second signal is sent to the current regulator again
So that the calutron generates the second magnetic field for being attracted the brake apparatus, the current value of second electric current with the second electric current
Less than the current value of first electric current.
Further, the motor is series machine.
Further, the power supply is AC power.
Further, the semiconductor element is one kind or combinations thereof in diode, triode, field-effect tube.
The invention has the beneficial effects that angle mill when power is off can fast braking polishing pad to avoid injury, have at
The small advantage of this lower calorific value.
Description of the drawings
Fig. 1 is the structure chart of angle mill；
Fig. 2 is the explosive view that angle is ground in Fig. 1, shows the structure of brake apparatus；
Fig. 3 is the internal circuit connection block diagram that angle is ground in Fig. 1；
Fig. 4 is the circuit connection block diagram as a kind of embodiment；
Fig. 5 is the circuit connection block diagram as another embodiment.
Specific implementation mode
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
Referring to figs. 1 to angle shown in Fig. 4 mill 100, including：Polishing pad 110, motor 120, power supply 130, output shaft 123, electricity
Magnetic device 150 and brake apparatus 160.
Polishing pad 110 is for realizing the instrumental function for example polished or cut.Polishing pad 110 is mounted in motor
One end of 120 output shaft 123, can be under the driving of motor 120 around the axis rotation where output shaft 123.
Power supply 130 is for providing electric energy.Specifically, power supply 130 is alternating current.Angle mill 100 include an ac plug with
Incoming transport alternating current is that motor 120 is powered so that motor 120 rotates.
Motor 120 includes rotor, winding and output shaft 123.Power supply 130 is powered for motor 120, the coil in winding 122
The rotation of field drives rotor is generated after energization, and then the output shaft 123 being connect with rotor is driven to rotate.Specifically, motor 120 is
Series machine.
Operation switch 180 is used for for user's operation, with first be electrically connected between turn-on power 130 and motor 120
The second state being electrically connected between state and deenergization 130 and motor 120.Specifically, the setting of Operation switch 180 is ground at angle
100 user-friendly position.As one kind of embodiment, which can be by compressing switch, with the side of pressing
Formula realizes the switching of first state and the second state；As the another kind of embodiment, Operation switch 180 can be driving switch,
With the first gear for being at first state and in the second gear of the second state.
Brake apparatus 160 is used for braking motor 120, and motor 120 can be made quickly to stop operating.Brake apparatus 160 is arranged
In the other end of output shaft 123.
Calutron 150 is used to generate the magnetic field for being attracted or detaching brake apparatus 160.Calutron 150 has non-brake
State and on-position.When calutron 150 is in non-brake state, calutron 150 is attracted brake apparatus 160 so that motor
120 normal works, when calutron 150 is in on-position, calutron 150 generates the magnetic field for making brake apparatus 160 detach
So that 120 fast braking of motor, avoids dangerous generation.Specifically, calutron 150 includes hot-wire coil 151, there is electric current
The magnetic field for being attracted or detaching brake apparatus 160 is generated when flowing through.
When Operation switch 180 is in first state, calutron 150 is in non-brake state；At Operation switch 180
When the second state, calutron 150 is in on-position.
Referring to fig. 1 and fig. 2, brake apparatus 160 includes flange part 161, magnetic part 163 and elastic component 162.Specifically
, flange part 161 is arranged in the end of output shaft 123.Magnetic part 163 with flange part 161 for contacting to braking motor
120.Elastic component 162 applies the active force for making magnetic part 163 be contacted with flange part 161 to magnetic part 163.
When Operation switch 180 is in the second state, calutron 150 is in on-position namely calutron 150 not
It is powered or power-off, the magnetic field deficiency that calutron 150 generates provides the active force for being attracted magnetic part 163, magnetic part 163 and electromagnetism
Device 150 detaches, while elastic component 162 oppresses magnetic part 163 and magnetic part 163 is made to contact friction with flange part 161 to prevent
The rotation of output shaft 123, and then braking motor 120.Specifically, elastic component 162 is spring.
When Operation switch 180 is in first state, calutron 150 is in non-brake state namely calutron 150
Be powered, generate and be attracted the magnetic field of magnetic part 163 magnetic part 163 is made to be attracted to calutron 150 so that magnetic part 163 with
Flange part 161 detaches, and motor 120 works normally.
Signal device 170 when Operation switch 180 is in first state for making calutron 150 be generated with the first electric current
It is attracted the first magnetic field of brake apparatus 160；So that calutron 150 is generated with the second electric current again and is attracted the second of brake apparatus 160
Magnetic field, the current value of the second electric current are less than the current value of the first electric current.Calutron when angle grinder is made can be reduced in this way to produce
Raw heat.
Signal device 170 includes current regulator 172 and controller 171.Current regulator 172 is electrically connected with controller 171
It connects, the electric current of calutron 150 is flowed through so that calutron 150 generates changing magnetic field for adjusting.Controller 171 be used for
Current regulator 172 sends signal to adjust the electric current for flowing through calutron 150.
As one kind of embodiment, as shown in figure 4, current regulator 172 is electronic switch K1.Controller 171 includes
MCU chip with control function.Specifically, electronic switch K1 is field-effect tube.Electronic switch K1 is electrical with hot-wire coil 151
Connection.Current regulator 172 or slide rheostat, potentiometer etc. can directly or indirectly adjust the electricity of hot-wire coil electric current
Subcomponent.
When Operation switch 180 is in first state, i.e., 180 turn-on power 130 of Operation switch connects with the electrical of motor 120
When connecing, controller 171 sends the first signal to electronic switch K1 makes hot-wire coil 151 that can be attracted braking dress with the generation of the first electric current
Set 160 the first magnetic field；When the duration of brake apparatus 160 be attracted under the first magnetic fields in hot-wire coil 151 reaching default
After length, controller 171 sends second signal to electronic switch K1 again makes hot-wire coil 151 that can be attracted braking with the generation of the second electric current
Second magnetic field of device 160.Wherein, the current value of the second electric current is less than the current value of the first electric current.
Specifically, controller 171 exports the first electric current and the by changing the duty ratio of the first signal and the second signal
Two electric currents, that is to say, that controller 171 sends the different the first signal and the second signal of duty ratio to flow through hot-wire coil
151 curent change.Further, output duty cycle is less than the second signal of the first signal, so that the current value of the second electric current
Less than the current value of the first electric current.This scheme reduces the heats that electromagnetism when 100 work of mill of angle generates.
Refering to what is shown in Fig. 4, angle mill 100 further includes power supply change-over device 140, it is electrically connected with power supply 130.Power supply converting means
140 are set for the electric energy of power supply 130 to be converted to the direct current with certain voltage to be supplied for controller 171 and electronic switch K1
Electricity.Specifically, power supply change-over device includes rectification circuit.
Angle mill 100 further includes the detection device 173 for detecting current or voltage, and hot-wire coil 151 is flowed through by detection
Electric current or hot-wire coil 151 both ends voltage to export corresponding signal to electronic switch K1.Specifically, detection device
173 be current sensor or voltage sensor.
As another embodiment, generated refering to what is shown in Fig. 5, signal device 270 includes current regulator 272 and signal
Circuit 271.
In the present embodiment, current regulator 272 is electronic switch K2, and certainly, current regulator 272 or sliding become
Device is hindered, by changing the resistance value of slide rheostat to change the electric current for flowing through calutron 250.As long as can be used in flowing through electromagnetism
The electronic component of the electric current of device 250 belongs to current regulator 272 mentioned here.
The difference is that, generated by this pure hardware mode of signal generating circuit 271 different with above-described embodiment
Signal to electronic switch K2.
Refering to what is shown in Fig. 5, signal generating circuit 271 includes capacitance C and semiconductor element.Specifically, one end of capacitance C connects
It is connected to power supply change-over device 220, the other end is grounded by connecting a resistance R.Semiconductor element is triode V, triode V's
Ground level is connected between resistance R and capacitance C, and emitter is connected to 210 conversion equipment of power supply, grounded collector.Semiconductor element
Can also be diode or field-effect tube or combination thereof.
When Operation switch 240 is in first state, the electric energy that power supply 210 provides is after the conversion of power supply change-over device 220
Charge for capacitance C, be zero in capacitance C charging transient capacitance both end voltages, triode V conducting, the electric current flowed out from power supply 210 according to
It is secondary to flow into power cathode through calutron 250, electronic switch K2, triode V to constitute current loop.At this point, flowing through electromagnetic installing
The electric current for setting 250 is the first electric current so that calutron 250 generates the magnetic field that can be attracted brake apparatus.
With the gradual charging of capacitance C, node voltage is increased up triode V and disconnects, and flows out, flows through from power supply 210
Electric current flows into cathode to constitute current loop through calutron 250, electronic switch K2, capacitance C, resistance R successively.At this point, flowing through
The electric current of calutron 250 is the second electric current, it is clear that the current value of the second electric current is less than the current value of the first electric current.
The anode of diode Q is connected to the base stage of triode V, and cathode is connected to the anode of triode V.Diode Q is used for
It protects triode to prevent it from having to be burnt out by high current or voltage.
The signal generating circuit that the present embodiment uses is simple in structure, at low cost, and calutron generates heat in lowering angle mill
Meanwhile reducing the production cost of angle mill.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (10)
1. a kind of angle mill, including：
Power supply, for providing electric energy；
Motor, for converting the electric energy of the power supply to mechanical energy output；
Operation switch, for for user's operation, the Operation switch, which has, is connected being electrically connected for the power supply and the motor
First state and the second state being electrically connected for disconnecting the power supply and the motor；
Brake apparatus, for braking the motor；
Calutron is at least used to generate the magnetic field for being attracted the brake apparatus, the calutron with non-brake state with
On-position, when the Operation switch is in first state, the calutron is opened in non-brake state in the operation
The calutron is in on-position when closing in the second state；
Signal device is used for
So that the calutron is generated with the first electric current when the Operation switch is in first state and is attracted the brake apparatus
The first magnetic field；The calutron is set to generate the second magnetic field for being attracted the brake apparatus with the second electric current again, described second
The current value of electric current is less than the current value of first electric current.
2. angle mill according to claim 1, which is characterized in that
The motor is series machine.
3. angle mill according to claim 1, which is characterized in that
The power supply is AC power.
4. a kind of angle mill, including：
Power supply, for providing electric energy；
Motor, for converting the electric energy of the power supply to mechanical energy output；
Operation switch, for for user's operation, the Operation switch, which has, is connected being electrically connected for the power supply and the motor
First state and the second state being electrically connected for disconnecting the power supply and the motor；
Brake apparatus, for braking the motor；
Calutron is at least used to generate the magnetic field for being attracted the brake apparatus, the calutron with non-brake state with
On-position, when the Operation switch is in first state, the calutron is opened in non-brake state in the operation
The calutron is in on-position when closing in the second state；
Current regulator flows through the electric current of the calutron so that the calutron generates changing magnetic field for adjusting；
Controller is used for
The first signal is sent so that the calutron to the current regulator when the Operation switch is in first state
The first magnetic field for being attracted the brake apparatus is generated with the first electric current；It is sent again to the current regulator after preset time
Second signal is so that the calutron generates the second magnetic field for being attracted the brake apparatus, second electric current with the second electric current
Current value be less than first electric current current value.
5. angle mill according to claim 4, which is characterized in that
The motor is series machine.
6. angle mill according to claim 4, which is characterized in that
The current regulator is electronic switch or slide rheostat.
7. a kind of angle mill, including：
Power supply, for providing electric energy；
Motor, for converting the electric energy of the power supply to mechanical energy output；
Operation switch, for for user's operation, the Operation switch, which has, is connected being electrically connected for the power supply and the motor
First state and the second state being electrically connected for disconnecting the power supply and the motor；
Brake apparatus, for braking the motor；
Calutron is at least used to generate the magnetic field for being attracted the brake apparatus, the calutron with non-brake state with
On-position, when the Operation switch is in first state, the calutron is opened in non-brake state in the operation
The calutron is in on-position when closing in the second state；
Current regulator flows through the electric current of the calutron so that the calutron generates changing magnetic field for adjusting；
Signal generating circuit, including capacitance and semiconductor element, are used for
The first signal is sent so that the calutron to the current regulator when the Operation switch is in first state
The first magnetic field for being attracted the brake apparatus is generated with the first electric current；It is sent again to the current regulator after preset time
Second signal is so that the calutron generates the second magnetic field for being attracted the brake apparatus, second electric current with the second electric current
Current value be less than first electric current current value.
8. angle mill according to claim 7, which is characterized in that
The motor is series machine.
9. angle mill according to claim 7, which is characterized in that
The power supply is AC power.
10. angle mill according to claim 7, which is characterized in that
The semiconductor element is one kind or combinations thereof in diode, triode, field-effect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053571.5A CN108340250A (en) | 2017-01-24 | 2017-01-24 | It grinds at angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053571.5A CN108340250A (en) | 2017-01-24 | 2017-01-24 | It grinds at angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108340250A true CN108340250A (en) | 2018-07-31 |
Family
ID=62963142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710053571.5A Pending CN108340250A (en) | 2017-01-24 | 2017-01-24 | It grinds at angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108340250A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3310729A1 (en) * | 1983-03-24 | 1984-09-27 | Metallwarenfabrik Twick & Lehrke KG, 4830 Gütersloh | Method of monitoring a grinding and/or a polishing device intended for the machining of light metal profiled sections |
| DE19604712A1 (en) * | 1996-02-09 | 1997-08-14 | Abb Patent Gmbh | Electromechanical friction brake especially for angle-grinding machine |
| CN201063577Y (en) * | 2007-06-26 | 2008-05-21 | 成都瑞迪机械实业有限公司 | Overexcitation power supply |
| CN201318406Y (en) * | 2008-10-30 | 2009-09-30 | 芜湖大中机电制造有限公司 | Electromagnetic dead brake |
| CN201332362Y (en) * | 2008-10-30 | 2009-10-21 | 芜湖大中机电制造有限公司 | Novel electronic rectification device |
-
2017
- 2017-01-24 CN CN201710053571.5A patent/CN108340250A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3310729A1 (en) * | 1983-03-24 | 1984-09-27 | Metallwarenfabrik Twick & Lehrke KG, 4830 Gütersloh | Method of monitoring a grinding and/or a polishing device intended for the machining of light metal profiled sections |
| DE19604712A1 (en) * | 1996-02-09 | 1997-08-14 | Abb Patent Gmbh | Electromechanical friction brake especially for angle-grinding machine |
| CN201063577Y (en) * | 2007-06-26 | 2008-05-21 | 成都瑞迪机械实业有限公司 | Overexcitation power supply |
| CN201318406Y (en) * | 2008-10-30 | 2009-09-30 | 芜湖大中机电制造有限公司 | Electromagnetic dead brake |
| CN201332362Y (en) * | 2008-10-30 | 2009-10-21 | 芜湖大中机电制造有限公司 | Novel electronic rectification device |
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Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Applicant after: Nanjing Quanfeng Technology Co.,Ltd. Address before: 211106, No. 159, general road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Applicant before: NANJING CHERVON INDUSTRY Co.,Ltd. |
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