CN203843807U - Angle grinder - Google Patents
Angle grinder Download PDFInfo
- Publication number
- CN203843807U CN203843807U CN201420290506.6U CN201420290506U CN203843807U CN 203843807 U CN203843807 U CN 203843807U CN 201420290506 U CN201420290506 U CN 201420290506U CN 203843807 U CN203843807 U CN 203843807U
- Authority
- CN
- China
- Prior art keywords
- angle grinder
- electric angle
- stator
- output disc
- machine shaft
- 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.)
- Expired - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 14
- 230000004888 barrier function Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 229910001651 emery Inorganic materials 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model discloses an angle grinder comprising a grinder shell, the grinder shell is internally provided with a brushless motor and a controller, the brushless motor comprises a motor rotary shaft, the outer end portion of the motor rotary shaft is provided with an output disc in a linkage and sleeved mode, the axis of the motor rotary shaft is perpendicular to the operation face of the output disc and passes through the circle center of the output disc, the periphery of the inner end of the motor rotary shaft is sleeved with a rotor iron core in a coaxial mode, a permanent magnet is arranged on the peripheral surface of the rotor iron core, and the grinder shell is further internally provided with a stator matched with the permanent magnet. The angle grinder is simple and compact in structure, long in service life and high in transmission efficiency.
Description
Technical field
The utility model relates to machining apparatus technical field, particularly a kind of electric angle grinder.
Background technology
Existing electric angle grinder, its type of drive is generally motor and drives, motor adopts series excited machine conventionally, this kind of series excited machine has carbon brush structure, series excited machine is realized electric current by carbon brush simultaneously and is commutated, carbon brush and rotor wearing and tearing are one of bottlenecks of tool life, and carbon brush abrasion generation carbon dust, and environment has been caused to certain pollution; On the other hand, in order to meet the operating mode needs in its practical work process, the transmission direction that conventionally need to adopt gear drive to realize between its motor shaft and output shaft changes and deceleration object.Yet this kind of assembly structure is owing to existing the more driving members such as gear, transmission efficiency is low, and causes its whole required assembly space larger, and assembly structure is comparatively complicated; Gear is vulnerable part simultaneously, and the existence of more gear driving member has caused the whole service life of electric angle grinder to affect adversely.
Utility model content
The purpose of this utility model is to provide a kind of electric angle grinder, this electric angle grinder simple and compact for structure, and service life is longer, and transmission efficiency is higher.
For solving the problems of the technologies described above, the utility model provides a kind of electric angle grinder, comprise casing, the inside of described casing is provided with brushless electric machine and controller, described brushless electric machine comprises machine shaft, be set with output disc, the axis of described machine shaft is perpendicular to the center of circle of operating surface and the described output disc of process of described output disc the outer end linkage of described machine shaft;
The inner peripheral part coaxial sleeve of described machine shaft is equipped with rotor core, on the outer peripheral face of described rotor core, is provided with permanent magnet, and the inside of described casing is also provided with the stator matching with described permanent magnet.
Preferably, described controller is positioned at the inside of described casing.
Preferably, on described machine shaft, coaxial sleeve is equipped with cooling fan.
Preferably, described stator comprises stator core, is a plurality ofly wound in the stator enamelled wire group in described stator core and is arranged at the cold air duct in described stator core.
Preferably, described cold air duct is comprised of the gap between adjacent two described stator enamelled wire groups and the gap between described stator core and described rotor core.
Preferably, between described machine shaft and described rotor core, be provided with insulating barrier, and described casing is plastic part.
Preferably, described insulating barrier is epoxy resin pipe.
Preferably, described electric angle grinder, by industrial frequency AC electric drive, is provided with the filter rectification module for AC-DC conversion in described controller.
Preferably, described output disc is any in emery wheel abrasive disc, cutting piece made from diamond, concrete cutting blade.
Preferably, described electric angle grinder is driven by DC low voltage power supply or power brick.
Relative above-mentioned background technology, electric angle grinder provided by the utility model, comprise casing, the inside of described casing is provided with brushless electric machine and controller, described brushless electric machine comprises machine shaft, be set with output disc, the axis of described machine shaft is perpendicular to the center of circle of operating surface and the described output disc of process of described output disc the outer end linkage of described machine shaft; The inner peripheral part coaxial sleeve of described machine shaft is equipped with rotor core, on the outer peripheral face of described rotor core, is provided with permanent magnet, and the inside of described casing is also provided with the stator matching with described permanent magnet.In the course of work, described permanent magnet drives described machine shaft to rotate under the magnetic fields of described stator, drives described output disc coaxial linkage to realize corresponding cutting cutting operation simultaneously.In the overall work structure of described electric angle grinder without drive mechanisms such as gears, integral installation distribution structure is simply compact, service life is longer, and it only needs brushless electric machine rotating shaft and relevant magnetic stator and rotor counterpart thereof can realize the deceleration of transmission mechanism, effectively avoid kinetic equation loss, made the transmission efficiency of described electric angle grinder higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the electric angle grinder that Fig. 1 provides for a kind of specific embodiment of the utility model;
Fig. 2 is the axial arrangement schematic diagram of brushless electric machine part in Fig. 1.
The specific embodiment
Core of the present utility model is to provide a kind of electric angle grinder, this electric angle grinder simple and compact for structure, and service life is longer, and transmission efficiency is higher.
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 1 and Fig. 2, the structural representation of the electric angle grinder that Fig. 1 provides for a kind of specific embodiment of the utility model; Fig. 2 is the axial arrangement schematic diagram of brushless electric machine part in Fig. 1.
In the specific embodiment, electric angle grinder provided by the utility model, comprise casing 11, the inside of casing 11 is provided with brushless electric machine and controller 14, described brushless electric machine comprises machine shaft 12, be set with output disc 13, the axis of machine shaft 12 is perpendicular to the operating surface of output disc 13 and through exporting the center of circle of disc 13 the outer end linkage of machine shaft 12; The inner peripheral part coaxial sleeve of machine shaft 12 is equipped with rotor core 121, is provided with permanent magnet 122 on the outer peripheral face of rotor core 121, and the inside of casing 11 is also provided with the stator 123 matching with permanent magnet 122.In the course of work, permanent magnet 122 drive motors rotating shaft 12 under the magnetic fields of stator 123 is rotated, and drives output disc 13 coaxial linkages to realize corresponding cutting cutting operation simultaneously.In the overall work structure of described electric angle grinder without drive mechanisms such as gears, integral installation distribution structure is simply compact, service life is longer, and it only needs brushless electric machine rotating shaft and relevant magnetic stator and rotor counterpart thereof can realize the deceleration of transmission mechanism, effectively avoid kinetic equation loss, made the transmission efficiency of described electric angle grinder higher.
Further, controller 14 is arranged at the inside of casing 11.Controller 14 is arranged to the assembly integrated level that described electric angle grinder can further be improved in casing 11 inside, and makes its structure compacter.This controller can be realized AC power to galvanic filtering, rectification, and the start-stop of described brushless electric machine, speed regulating control, overcurrent protection, power-off protection and soft start etc. are controlled to function.
Brushless electric machine in the present embodiment has following characteristics in real work: efficiency is high, and electric efficiency is more than 80%; Complete machine long service life, because there is no carbon brush and gear, service life is more than 1200 hours; Noise is low, and level of noise is in 65db (decibel) left and right; Volume is little, lightweight; There is overcurrent protection and prominent calling protection.
On the other hand, stator 123 comprises stator core 124, is a plurality ofly wound in the stator enamelled wire group 125 in stator core 124 and is arranged at the cold air duct 126 in stator core 124.By cold air duct 43 is set, so that Air Flow effectively reduces the temperature of stator enamelled wire group 42, and then improves current density, guarantee the brushless electric machine that the brushless electric machine in the present embodiment is high power density, that is, the power that the motor of unit volume produces is higher.
In addition, cold air duct 126 is comprised of the gap between adjacent two stator enamelled wire groups 125 and the gap between stator core 124 and rotor core 121.Stator enamelled wire is wound around on stator core 124, forms stator enamelled wire group 125.In winding process, between adjacent two stator enamelled wire groups 125, have gap, for Air Flow, the gap between adjacent two stator enamelled wire groups 125 is communicated with the gap between rotor core 121 with stator core 124, further strengthen Air Flow, improved cooling effect.
As tables of data below shows, the diameter of stator 4 of take is 55mm-65mm, and the brushless electric machine that stator height is 20mm is example:
In table 1 prior art with comparing data of the present utility model
Hence one can see that, the size of the brushless electric machine that the utility model embodiment provides (stator diameter and height) is all less than the size of brushless electric machine of the prior art, but, power is greater than the power of brushless electric machine of the prior art, therefore, the power that the motor of its unit volume produces is higher, and making the brushless electric machine that the utility model embodiment provides is high power density motor.
Particularly, on machine shaft 12, coaxial sleeve is equipped with cooling fan 15.This cooling fan 15 can be described brushless electric machine cooling in the course of the work, to guarantee the reliable and stable operation of its body of work assembly.
More specifically, on casing 11, there is the ventilating opening 111 matching with described brushless electric machine.This ventilating opening 111 can further improve the cooling effect of described brushless electric machine.
On the other hand, between machine shaft 12 and rotor core 121, be provided with insulating barrier 127, insulating barrier 127 is epoxy resin pipe, and casing 11 is plastic part.This insulating barrier and cabinet complement each other to form double insulation structure, can effectively guarantee that described electric angle grinder meets corresponding insulation safety requirement, and improve its safety in utilization.
Certainly, above-mentioned insulating barrier is that epoxy resin pipe is only preferred version, and its material is not limited to epoxy resin pipe mentioned above, so long as can meet the actual use needs of described electric angle grinder, all can.
More specifically, described electric angle grinder is driven by industrial-frequency alternating current (AC:110-127V/220-240V), is provided with the filter rectification module for AC-DC conversion in controller 14.In practical set use procedure, described electric angle grinder is to realize alternating current to galvanic conversion by filter rectification module, then is input to motor, and this is the current technical scheme of brushless electric machine.
Further, output disc 13 is any in emery wheel abrasive disc, cutting piece made from diamond, concrete cutting blade.Certainly, this output disc 13 is not limited to emery wheel abrasive disc mentioned above, cutting piece made from diamond, concrete cutting blade etc., staff can need to select flexibly according to actual condition the material of output disc 13, that is, so long as can meet the actual use needs of described electric angle grinder and all can.
More specifically, described electric angle grinder is driven by DC low voltage power supply or power brick.
In order to illustrate that better in the utility model, brushless electric machine is applied to the improvement effect after electric angle grinder, now list the related data of electric angle grinder application series excited machine and brushless coaxial motor in following table:
Note: the level of noise in above form is the level of noise under each tool belt work disc Light Condition.
In summary, the electric angle grinder providing in the utility model, comprise casing, the inside of described casing is provided with brushless electric machine and controller, described brushless electric machine comprises machine shaft, be set with output disc, the axis of described machine shaft is perpendicular to the center of circle of operating surface and the described output disc of process of described output disc the outer end linkage of described machine shaft; The inner peripheral part coaxial sleeve of described machine shaft is equipped with rotor core, on the outer peripheral face of described rotor core, is provided with permanent magnet, and the inside of described casing is also provided with the stator matching with described permanent magnet.In the course of work, described permanent magnet drives described machine shaft to rotate under the magnetic fields of described stator, drives described output disc coaxial linkage to realize corresponding cutting cutting operation simultaneously.In the overall work structure of described electric angle grinder without drive mechanisms such as gears, integral installation distribution structure is simply compact, service life is longer, and it only needs brushless electric machine rotating shaft and relevant magnetic stator and rotor counterpart thereof can realize the deceleration of transmission mechanism, effectively avoid kinetic equation loss, made the transmission efficiency of described electric angle grinder higher.
Above electric angle grinder provided by the utility model is described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. an electric angle grinder, comprise casing, it is characterized in that: the inside of described casing is provided with brushless electric machine and controller, described brushless electric machine comprises machine shaft, be set with output disc, the axis of described machine shaft is perpendicular to the center of circle of operating surface and the described output disc of process of described output disc the outer end linkage of described machine shaft;
The inner peripheral part coaxial sleeve of described machine shaft is equipped with rotor core, on the outer peripheral face of described rotor core, is provided with permanent magnet, and the inside of described casing is also provided with the stator matching with described permanent magnet.
2. electric angle grinder as claimed in claim 1, is characterized in that: described controller is positioned at the inside of described casing.
3. electric angle grinder as claimed in claim 1, is characterized in that: on described machine shaft, coaxial sleeve is equipped with cooling fan.
4. electric angle grinder as claimed in claim 1, is characterized in that: described stator comprises stator core, is a plurality ofly wound in the stator enamelled wire group in described stator core and is arranged at the cold air duct in described stator core.
5. electric angle grinder as claimed in claim 4, is characterized in that: described cold air duct is comprised of the gap between adjacent two described stator enamelled wire groups and the gap between described stator core and described rotor core.
6. electric angle grinder as claimed in claim 1, is characterized in that: between described machine shaft and described rotor core, be provided with insulating barrier, and described casing is plastic part.
7. electric angle grinder as claimed in claim 6, is characterized in that: described insulating barrier is epoxy resin pipe.
8. electric angle grinder as claimed in claim 1, is characterized in that: described electric angle grinder, by industrial frequency AC electric drive, is provided with the filter rectification module for AC-DC conversion in described controller.
9. electric angle grinder as claimed in claim 1, is characterized in that: described output disc is any in emery wheel abrasive disc, cutting piece made from diamond, concrete cutting blade.
10. electric angle grinder as claimed in claim 1, is characterized in that: described electric angle grinder is driven by DC low voltage power supply or power brick.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290506.6U CN203843807U (en) | 2014-05-30 | 2014-05-30 | Angle grinder |
| PCT/CN2014/089562 WO2015180395A1 (en) | 2014-05-30 | 2014-10-27 | Angle grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290506.6U CN203843807U (en) | 2014-05-30 | 2014-05-30 | Angle grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203843807U true CN203843807U (en) | 2014-09-24 |
Family
ID=51556865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420290506.6U Expired - Fee Related CN203843807U (en) | 2014-05-30 | 2014-05-30 | Angle grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203843807U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015180395A1 (en) * | 2014-05-30 | 2015-12-03 | 浙江绿动电机科技有限公司 | Angle grinder |
| CN105437159A (en) * | 2014-05-30 | 2016-03-30 | 浙江绿动电机科技有限公司 | Angle grinder |
| CN110370138A (en) * | 2019-08-01 | 2019-10-25 | 浙江实利电机有限公司 | A kind of air-cooled straight drive electric angle grinder |
-
2014
- 2014-05-30 CN CN201420290506.6U patent/CN203843807U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015180395A1 (en) * | 2014-05-30 | 2015-12-03 | 浙江绿动电机科技有限公司 | Angle grinder |
| CN105437159A (en) * | 2014-05-30 | 2016-03-30 | 浙江绿动电机科技有限公司 | Angle grinder |
| CN110370138A (en) * | 2019-08-01 | 2019-10-25 | 浙江实利电机有限公司 | A kind of air-cooled straight drive electric angle grinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 |