CN209692340U - Motor temperature protector and annular saw - Google Patents
Motor temperature protector and annular saw Download PDFInfo
- Publication number
- CN209692340U CN209692340U CN201920323126.0U CN201920323126U CN209692340U CN 209692340 U CN209692340 U CN 209692340U CN 201920323126 U CN201920323126 U CN 201920323126U CN 209692340 U CN209692340 U CN 209692340U
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- temperature
- motor
- carbon brush
- rotor
- control circuit
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Abstract
The utility model discloses a kind of motor temperature protectors comprising electric machine casing, external power supply input switch, carbon brush, carbon brush holder, temperature sensor and control circuit；Rotor, stator and the carbon brush holder of motor are mounted in electric machine casing；Carbon brush is fixed on carbon brush holder；Carbon brush directly with rotor rotating contact；External power supply input switch is electrically connected with carbon brush；Temperature sensor is arranged in electric machine casing, for detecting motor casing body temperature and sending in shell temperature signal to control circuit；Control circuit controls the revolving speed of rotor according to the temperature signal of temperature sensor.The invention also discloses a kind of annular saws including above-mentioned motor temperature protector.The utility model can effectively solve motor caused by overload, stall, carbon brush exception etc. and damage, extends the bulk life time of motor.
Description
Technical field
The utility model relates to electric tool motor, in particular to a kind of motor temperature protector and annular saw.
Background technique
The working ability of equipment is also mentioned with the development of technical matters in electro-mechanical arts especially Power Tools Industries
Higher requirement out, this requires the motors of tool being capable of the bigger electric current of load and higher power.When motor is in one kind
Abnormal condition, if stall or carbon brush generate big spark extremely and lead to high fever, so that the hurried raising of motor internal temperature, such as
If continuing to run, part thawing or motor component damage may cause.
Annular saw is widely applied in building decoration and home life as traditional wood working tool.It is even more in recent years
It is promoted and applied on the workpiece of cutting metal material.Annular saw drives and generates inside the motor of saw blade when processing cutting workpiece
Heat causes temperature to increase.For annular saw, rotor rotates rear drive gear or directly drives saw blade and goes to cut various materials
The workpiece of matter and thickness, workpiece hardness is higher, and thickness value is bigger, and the power supply provided by carbon brush 3 is more, at this time electric machine casing 1
Internal temperature is higher, and the temperature of superelevation will generate damage to internal structure of motor and performance, for example melt or deform.
Utility model content
The technical problems to be solved in the utility model is motor caused by can effectively solve overload, stall, carbon brush exception etc.
Damage, extends the bulk life time of motor.
In order to solve the above technical problems, motor temperature protector provided by the utility model comprising electric machine casing 1,
External power supply input switch 2, carbon brush 3, carbon brush holder 4, temperature sensor 5 and control circuit；
Rotor 7, stator and the carbon brush holder 4 of motor are mounted in the electric machine casing 1；
The carbon brush 3 is fixed on the carbon brush holder 4；
The carbon brush 3 directly with 7 rotating contact of rotor；
The external power supply input switch 2 is electrically connected with the carbon brush 3；
The temperature sensor 5 is arranged in electric machine casing 1, warm in shell for detecting motor casing body temperature and sending
Signal is spent to the control circuit；
The control circuit controls the revolving speed of rotor 7 according to the temperature signal of the temperature sensor 5.
Preferably, if motor stalling is more than power-up operating after setting time, when the shell that the temperature sensor 5 is sent
Interior temperature signal is low-temperature condition or the condition of high temperature, and the control circuit control motor works by normal condition, and motor speed is
Rated speed；When temperature signal is superelevation temperature state in the shell that the temperature sensor 5 is sent, the control circuit control is electric
Machine works by guard mode, even if motor is lower than rated speed or stalling；
If motor stalling is less than operating is powered on after setting time, when the shell body temperature that the temperature sensor 5 is sent
Signal low-temperature condition, the control circuit control motor work by normal condition, and motor speed is rated speed；When the temperature
Temperature signal is the condition of high temperature or superelevation temperature state in the shell that sensor 5 is sent, and control circuit controls motor and presses guard mode
Work, even if motor is lower than rated speed or stalling；
When the temperature that temperature sensor 5 detects is less than or equal to lower limit set temperature, temperature signal in the shell of transmission
For low-temperature condition；When the temperature that temperature sensor 5 detects is greater than lower limit set temperature and is less than upper limit set temperature, hair
Temperature signal is the condition of high temperature in the shell sent；When the temperature that temperature sensor 5 detects is more than or equal to upper limit set temperature,
Temperature signal is superelevation temperature state in the shell of transmission；Lower limit set temperature is less than upper limit set temperature.
Preferably, lower limit set temperature is 100 DEG C to 130 DEG C, upper limit set temperature is 140 DEG C to 190 DEG C.
Preferably, lower limit set temperature is 100 DEG C, upper limit set temperature is 190 DEG C.
Preferably, lower limit set temperature is 120 DEG C, upper limit set temperature is 150 DEG C.
Preferably, working as temperature signal in the shell that the temperature sensor 5 is sent is low-temperature condition, control circuit control electricity
Machine works by normal condition, and motor speed is rated speed；
When temperature signal is the condition of high temperature in the shell that the temperature sensor 5 is sent, control circuit controls motor by guarantor
Work status is protected, even if motor is lower than rated speed or stalling；
When the temperature that temperature sensor 5 detects is less than or equal to benchmark set temperature, temperature signal in the shell of transmission
For low-temperature condition；
When the temperature that temperature sensor 5 detects is greater than benchmark set temperature, temperature signal is height in the shell of transmission
Temperature state.
Preferably, the benchmark set temperature is 120 DEG C to 140 DEG C.
Preferably, the benchmark set temperature is 130 DEG C or 120 DEG C.
Preferably, the temperature sensor 5 is mounted on carbon brush holder 4；
The carbon brush holder 4 is metal material.
Preferably, the temperature sensor 5 is mounted on carbon brush holder 4 and is less than 2cm apart from the carbon brush.
Preferably, rotor 7, stator and air blade are arranged in circular tube shaped electric machine casing 1 in the front-back direction；
Motor stator covers outside 7 rear portion of rotor；
7 front of rotor is circumferentially fixed with air blade；
The carbon brush holder 4 is fixed on the electric machine casing 1 at 7 rear end of rotor；
1 rear end of electric machine casing, which fastens, rear chassis 6；
The carbon brush holder 4 is located at rear chassis 6 between 7 rear end of rotor.
Preferably, the control circuit and the external power supply input switch 2 are arranged in same printed circuit board.
Preferably, the control circuit is arranged in a printed circuit board, the external power supply input switch 2 independently of
Except the printed circuit board.
In order to solve the above technical problems, a kind of circle including above-mentioned motor temperature protector provided by the utility model
Saw, further includes bottom plate and saw blade；
The pedestal offers saw blade slot in the front-back direction；
The saw blade passes through saw blade slot, is pivotally affixed on pedestal by the drive shaft of left and right directions；
The motor is for driving the saw blade to rotate around the drive shaft.
The motor temperature protector of the utility model, when external power supply input switch 2 is connected, by carbon brush 3 by power supply
The rotation of 7 driving motor rotor of rotor is accessed, motor converts electrical energy into mechanical energy output.The motor temperature protector, passes through
Accurately detection motor internal temperature changes and efficiently controls the revolving speed of rotor, can effectively solve overload, stall, carbon brush
Motor caused by abnormal etc. damages, and greatly prolongs the bulk life time of motor.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model, below to the required attached drawing of the utility model
It is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the one embodiment overall schematic of motor temperature protector of the utility model；
Fig. 2 is the one embodiment temperature sensor location schematic diagram of motor temperature protector of the utility model；
Fig. 3 is the one embodiment electronic device connection schematic diagram of motor temperature protector of the utility model.
Description of symbols in figure:
1 electric machine casing；2 external power supply input switches；3 carbon brush；4 carbon brush holders；5 temperature sensors；7 rotors；6 casings
Rear cover.
Specific embodiment
Below in conjunction with attached drawing, clear, complete description is carried out to the technical solution in the utility model, it is clear that retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
Embodiment one
As shown in Fig. 1 to Fig. 3, motor temperature protector include electric machine casing 1, external power supply input switch 2, carbon brush 3,
Carbon brush holder 4, temperature sensor 5 and control circuit；
Rotor 7, stator and the carbon brush holder 4 of motor are mounted in the electric machine casing 1；
The carbon brush 3 is fixed on the carbon brush holder 4；
The carbon brush 3 directly with 7 rotating contact of rotor；
The external power supply input switch 2 is electrically connected with the carbon brush 3；
The temperature sensor 5 is arranged in electric machine casing 1, warm in shell for detecting motor casing body temperature and sending
Signal is spent to the control circuit；
The control circuit controls the revolving speed of rotor 7 according to the temperature signal of the temperature sensor 5.
The motor temperature protector of embodiment one is connect power supply by carbon brush 3 when external power supply input switch 2 is connected
Enter the rotation of 7 driving motor rotor of rotor, motor converts electrical energy into mechanical energy output.The motor temperature protector, passes through standard
The revolving speed that motor internal temperature changes and efficiently controls rotor really is detected, it is different to can effectively solve overload, stall, carbon brush
Motor damage, greatly prolongs the bulk life time of motor caused by often waiting.
Embodiment two
Based on the motor temperature protector of embodiment one, if motor stalling is more than power-up operating after setting time, when
Temperature signal is low-temperature condition or the condition of high temperature in the shell that the temperature sensor 5 is sent, and the control circuit controls motor
It works by normal condition, motor speed is rated speed；When temperature signal is superelevation in the shell that the temperature sensor 5 is sent
Temperature state, the control circuit control motor works by guard mode, even if motor is lower than rated speed or stalling；
If motor stalling is less than operating is powered on after setting time, when the shell body temperature that the temperature sensor 5 is sent
Signal low-temperature condition, the control circuit control motor work by normal condition, and motor speed is rated speed；When the temperature
Temperature signal is the condition of high temperature or superelevation temperature state in the shell that sensor 5 is sent, and control circuit controls motor and presses guard mode
Work, even if motor is lower than rated speed or stalling；
When the temperature that temperature sensor 5 detects is less than or equal to lower limit set temperature, temperature signal in the shell of transmission
For low-temperature condition；When the temperature that temperature sensor 5 detects is greater than lower limit set temperature and is less than upper limit set temperature, hair
Temperature signal is the condition of high temperature in the shell sent；When the temperature that temperature sensor 5 detects is more than or equal to upper limit set temperature,
Temperature signal is superelevation temperature state in the shell of transmission；Lower limit set temperature is less than upper limit set temperature.
Preferably, lower limit set temperature is 100 DEG C to 130 DEG C (such as 100 DEG C, 120 DEG C), upper limit set temperature is 140
DEG C to 190 DEG C (such as 150 DEG C, 190 DEG C).
The motor temperature protector of embodiment two changes and efficiently controls by accurately detecting motor internal temperature
Motor enters self-protection state, can be effectively prevented from and continue to use to the motor being under improper use state and therefore big
It is big to extend motor service life.
Embodiment three
Based on the motor temperature protector of embodiment one, when temperature signal in the shell that the temperature sensor 5 is sent
For low-temperature condition, control circuit controls motor and works by normal condition, and motor speed is rated speed；
When temperature signal is the condition of high temperature in the shell that the temperature sensor 5 is sent, control circuit controls motor by guarantor
Work status is protected, even if motor is lower than rated speed or stalling；
When the temperature that temperature sensor 5 detects is less than or equal to benchmark set temperature, temperature signal in the shell of transmission
For low-temperature condition；
When the temperature that temperature sensor 5 detects is greater than benchmark set temperature, temperature signal is height in the shell of transmission
Temperature state.
Preferably, benchmark set temperature is 120 DEG C to 140 DEG C (such as 130 DEG C, 120 DEG C).
The motor temperature protector of embodiment three changes and efficiently controls by accurately detecting motor internal temperature
Motor enters self-protection state, can be effectively prevented from and continue to use to the motor being under improper use state and therefore big
It is big to extend motor service life.
Example IV
The temperature sensor 5 is mounted on carbon brush holder 4；
The carbon brush holder 4 is metal material.
Preferably, the temperature sensor 5 is mounted on carbon brush holder 4 and is less than 2cm apart from the carbon brush.
When motor works, highest temperature is exactly carbon brush 3, and carbon brush 3 is mounted on carbon brush holder 4, the carbon brush holder 4 of metal material
With very high heating conduction, temperature sensor 5 is mounted on carbon brush holder 4, soon can measure or find rotor and carbon brush 3
Temperature change.
Embodiment five
Based on the motor temperature protector of embodiment one, rotor 7, stator and air blade are arranged in the front-back direction
In circular tube shaped electric machine casing 1；
Motor stator covers outside 7 rear portion of rotor；
7 front of rotor is circumferentially fixed with air blade；
The carbon brush holder 4 is fixed on the electric machine casing 1 at 7 rear end of rotor；
1 rear end of electric machine casing, which fastens, rear chassis 6；
The carbon brush holder 4 is located at rear chassis 6 between 7 rear end of rotor.
Preferably, the control circuit and the external power supply input switch 2 are arranged at same printed circuit board (PCB)
On.
Preferably, the control circuit is arranged on a printed circuit board (PCB), the external power supply input switch 2
Except the printed circuit board (PCB).
The motor temperature protector of embodiment five, rear chassis 6 can protect temperature sensor 5 and carbon brush 3 etc. by outer
Portion directly injures.
Embodiment six
It is a kind of including embodiment one arrive any motor temperature protector of embodiment five annular saw, annular saw further include bottom plate and
Saw blade；
The pedestal offers saw blade slot in the front-back direction；
The saw blade passes through saw blade slot, is pivotally affixed on pedestal by the drive shaft of left and right directions；
The motor is for driving the saw blade to rotate around the drive shaft.
The above is only preferred embodiment of the present application, it is not used to limit the application.Come for those skilled in the art
It says, various changes and changes are possible in this application.Within the spirit and principles of this application, made any modification, equivalent
Replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of motor temperature protector, which is characterized in that it includes electric machine casing, external power supply input switch, carbon brush, carbon
Brush holder, temperature sensor and control circuit；
Rotor, stator and the carbon brush holder of motor are mounted in the electric machine casing；
The carbon brush is fixed on the carbon brush holder；
The carbon brush directly with rotor rotating contact；
The external power supply input switch is electrically connected with the carbon brush；
The temperature sensor is arranged in electric machine casing, for detecting motor casing body temperature and sending temperature signal in shell
To the control circuit；
The control circuit controls the revolving speed of rotor according to the temperature signal of the temperature sensor.
2. motor temperature protector according to claim 1, which is characterized in that
When temperature signal is low-temperature condition in the shell that the temperature sensor is sent, control circuit controls motor and presses normal condition
Work, motor speed is rated speed；
When temperature signal is the condition of high temperature in the shell that the temperature sensor is sent, control circuit controls motor and presses guard mode
Work, even if motor is lower than rated speed or stalling；
When the temperature that temperature sensor detects is less than or equal to benchmark set temperature, temperature signal is low temperature in the shell of transmission
State；
When the temperature that temperature sensor detects is greater than benchmark set temperature, temperature signal is high temperature shape in the shell of transmission
State.
3. motor temperature protector according to claim 2, which is characterized in that
The benchmark set temperature is 120 DEG C to 140 DEG C.
4. motor temperature protector according to claim 2, which is characterized in that
The benchmark set temperature is 130 DEG C or 120 DEG C.
5. motor temperature protector according to claim 1, which is characterized in that
The temperature sensor is mounted on carbon brush holder；
The carbon brush holder is metal material.
6. motor temperature protector according to claim 5, which is characterized in that
The temperature sensor is mounted on carbon brush holder and is less than 2cm apart from the carbon brush.
7. motor temperature protector according to claim 1, which is characterized in that
Rotor, stator and air blade are arranged in circular tube shaped electric machine casing in the front-back direction；
Motor stator covers outside rotor rear portion；
Rotor front is circumferentially fixed with air blade；
The carbon brush holder is fixed on the electric machine casing at rotor rear end；
The electric machine casing rear end, which fastens, rear chassis；
The carbon brush holder is located at rear chassis between rotor rear end.
8. motor temperature protector according to claim 1, which is characterized in that
The control circuit and the external power supply input switch are arranged in same printed circuit board.
9. motor temperature protector according to claim 1, which is characterized in that
The control circuit is arranged in a printed circuit board, and the external power supply input switch is independently of the bar printing circuit
Except plate.
10. a kind of annular saw for arriving any motor temperature protector of claim 9 including claim 1, which is characterized in that it is also
Including bottom plate and saw blade；
The pedestal offers saw blade slot in the front-back direction；
The saw blade passes through saw blade slot, is pivotally affixed on pedestal by the drive shaft of left and right directions；
The motor is for driving the saw blade to rotate around the drive shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920323126.0U CN209692340U (en) | 2019-03-14 | 2019-03-14 | Motor temperature protector and annular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920323126.0U CN209692340U (en) | 2019-03-14 | 2019-03-14 | Motor temperature protector and annular saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209692340U true CN209692340U (en) | 2019-11-26 |
Family
ID=68604952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920323126.0U Active CN209692340U (en) | 2019-03-14 | 2019-03-14 | Motor temperature protector and annular saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209692340U (en) |
-
2019
- 2019-03-14 CN CN201920323126.0U patent/CN209692340U/en active Active
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