CN203722381U - Electric tool with dust filtering device - Google Patents
Electric tool with dust filtering device Download PDFInfo
- Publication number
- CN203722381U CN203722381U CN201420035447.8U CN201420035447U CN203722381U CN 203722381 U CN203722381 U CN 203722381U CN 201420035447 U CN201420035447 U CN 201420035447U CN 203722381 U CN203722381 U CN 203722381U
- Authority
- CN
- China
- Prior art keywords
- magnetic stripe
- back cover
- electric tool
- stator
- air inlet
- 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 - Lifetime
Links
- 239000000428 dust Substances 0.000 title claims abstract description 48
- 238000001914 filtration Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 238000009825 accumulation Methods 0.000 abstract description 5
- 230000005923 long-lasting effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The utility model discloses an electric tool with a dust filtering device, which comprises a shell. The shell comprises a motor shell and a rear cover; the rear end of the motor shell is connected with the front end of the rear cover; a stator and a rotor are positioned in the motor shell; the rotor or the stator is a permanent magnet; an air inlet is arranged in the rear cover; gaps exist between the motor shell and the stator and between the stator and the rotor; an air outlet is arranged at the head part of the shell; the air inlet, the gaps and the air outlet are sequentially communicated to form a cooling air duct; and a magnetic piece is arranged in the cooling air duct between the air outlet and the permanent magnet. Cooling air enters from the air inlet, enters the gaps via the magnetic piece and flows out from the air outlet, dust flow capable of being magnetized in the cooling air is absorbed by the magnetic piece when passing through the magnetic field range of the magnetic piece, dust capable of being magnetized can be prevented from entering the place where the stator and the rotor are located, accumulation of magnetic dust on the stator or the rotor can be effectively avoided or the stator or the rotor can be prevented from being clamped by the dust, long-lasting and normal operation of the motor can be ensured, personal safety of an operator can be ensured, and hidden dangers existing in the electric tool can be eliminated.
Description
Technical field
The utility model relates to a kind of electric tool with dust filtration device.
Background technology
In general motor for electric tool is single phase series motivated motor in the market, but more and more universal along with rechargeable tool, micromachine is also more and more widely used, in addition, upgrading transition along with Power Tools Industries, increasing producer starts research and development, application brushless electric machine, no matter be micromachine or brushless electric machine, they all have identical or close cooling air duct construction with common single phase series motivated motor, but different from single phase series motivated motor is micromachine, one of them adopts permanent magnet stator in part brushless electric machine or rotor, so, once the dust that electric tool in use has iron filings etc. to be easily magnetized enters the cooling air channel of motor, when the gap of flow through stator outer surface and rotor (air gap), can be adsorbed on the permanent magnet surfaces as stator or rotor, the accumulation of the dust that can be magnetized makes motor internal safe distance not up to standard, cause motor high-voltage breakdown inefficacy or electric tool electric leakage, operating personnel are caused to serious security threat, or the larger particles dust that can be magnetized is inhaled into the rotor gap of motor, cause the running of motor to be stuck, motor was lost efficacy by stall, if produce unexpected stall in the use procedure of instrument, operator is taken by surprise, cause damage to person.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of electric tool with dust filtration device, effectively prevent from being magnetized on stator or rotor dust accumulation or snap in, guarantee motor for a long time, normally use, and then guarantee operator's personal safety, eliminate the potential safety hazard that electric tool exists.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of electric tool with dust filtration device, comprise casing, described casing comprises motor casing and back cover, the rear end of described motor casing is connected with the front end of back cover, in described motor casing, be positioned with stator and rotor, described rotor or stator are permanent magnet, described back cover is provided with air inlet, between described motor casing and stator and between stator and rotor, there is gap, the head of described casing is provided with air outlet, described air inlet, gap is communicated with into cooling air channel successively with air outlet, in cooling air channel between described air inlet and permanent magnet, be furnished with magnetic part.Cooling air enters from air inlet, through magnetic part, enter gap, from air outlet, flow out again, the dust that can be magnetized in cooling air is adsorbed by magnetic part while flowing through the magnetic field range of magnetic part, the dust of having avoided being magnetized enters stator rotor place place, the accumulation of the dust that effectively prevents from being magnetized on stator or rotor or snap in, guarantee motor for a long time, normally use, and then assurance operator's personal safety, eliminate the potential safety hazard that electric tool exists.
Improved, described magnetic part comprises at least one magnetic stripe.
Improved, described magnetic stripe is located on air inlet, and described air inlet comprises some strip gabs, and some strip gabs are arranged in juxtaposition along the Width of strip gab, and the length direction of described magnetic stripe and the length direction of strip gab intersect.The magnetic field range that guarantees can to guarantee to flow through cooling air by cooling air when air inlet flows into casing smoothly magnetic stripe produces, the dust that can be magnetized in cooling air is inevitable be adsorbed by magnetic stripe.
Improved, described back cover comprises back cover one and back cover two, the rear end of described motor casing is connected with the front end of back cover one, described back cover one is provided with installing port, described back cover two is detachably connected on installing port, described air inlet is located on back cover two, and described magnetic stripe is removably connected and is positioned on air inlet by the inwall with back cover two.Back cover two can be disassembled from back cover one, magnetic stripe is carried out to periodic cleaning, guarantee its permanent effectively use.
Improved, described magnetic stripe is located at the front end of back cover, described back cover is provided with the socket passing for magnetic stripe, and the upper end of described magnetic stripe is provided with the magnetic stripe support one coordinating with socket location, and described magnetic stripe is fixed on magnetic stripe support one and is vertically placed in cooling air channel through socket.Magnetic stripe is located to the place away from air inlet, avoids magnetic stripe initiatively to adsorb extraneous magnetic, affect its result of use.
Improved, described back cover inside is provided with support two, and described support two is provided with the slot of accommodating magnetic stripe bottom.Strengthen the fixedly fastness of magnetic stripe.
Improved, two-part demarcation strip before and after the front end of described support two or rear end are provided with casing inside is divided into, described demarcation strip is provided with ventilating opening, and described magnetic stripe is positioned on ventilating opening.Cooling air is concentrated and from ventilating opening, flow to motor casing, make must the flow through magnetic field range of magnetic stripe of cooling air.
Improved, the upper end of described magnetic stripe support one is provided with radially outward outstanding boss, is provided with radially inwardly outstanding location-plate in described socket, and described boss is supported on location-plate.By boss, coordinate the location of realizing magnetic stripe with the location of location-plate, and installing/dismounting is all very convenient.
Improved, described air inlet is provided with dust cover, and described magnetic part is the magnetic stripe being positioned on dust cover.By the dust of dust cover stop portions, by being arranged so that in the magnetic field range of dust cover in magnetic stripe of magnetic stripe, through the dust that can be magnetized in the cooling air of dust cover, by magnetic stripe, adsorbed.
Beneficial effect:
Adopt after technique scheme, in the cooling air channel of a kind of electric tool with dust filtration device of this utility model between air inlet and permanent magnet, arrange magnetic part, cooling air enters from air inlet, through magnetic part, enter gap, from air outlet, flow out again, when flowing through magnetic part, the dust that can be magnetized in cooling air adsorbed by magnetic part, the dust of having avoided being magnetized enters place, stator rotor place, effectively prevent from being magnetized on stator or rotor dust accumulation or snap in, guarantee the permanent of motor, normal use, and then assurance operator's personal safety, eliminate the potential safety hazard that electric tool exists.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the internal structure schematic diagram of embodiment mono-;
Fig. 2 is the explosive view of embodiment mono-;
Fig. 3 is the internal structure schematic diagram of embodiment bis-;
Fig. 4 is the explosive view of embodiment bis-;
Fig. 5 is the structural representation of back cover in embodiment bis-;
Fig. 6 is the structural representation at place, magnetic stripe place in embodiment bis-;
Fig. 7 is the structural representation of embodiment tri-.
Embodiment
Embodiment mono-:
As depicted in figs. 1 and 2, a kind of electric tool with dust filtration device, comprise casing, described casing comprises motor casing 1 and back cover 2, the rear end of described motor casing is connected with the front end of back cover, in described motor casing, be positioned with stator 31 and rotor 32, described rotor or stator are permanent magnet, described back cover comprises back cover 1 and back cover 2 22, the rear end of described motor casing is connected with the front end of back cover one, described back cover one is provided with installing port 211, described back cover two is detachably connected on installing port, described back cover two is provided with air inlet 41, between described motor casing and stator and between stator and rotor, there is gap 42, the head of described casing is provided with air outlet 43, described air inlet, gap is communicated with into cooling air channel successively with air outlet, in cooling air channel between described air inlet and permanent magnet, be furnished with magnetic part 5, described magnetic part comprises at least one magnetic stripe, described magnetic stripe is provided with one or two or three or five or eight, when magnetic stripe be provided with two and when above magnetic stripe along the Width of magnetic stripe, be arranged in juxtaposition, in the present embodiment, described magnetic stripe is provided with one, described magnetic stripe is removably connected and is positioned on air inlet by the inwall with back cover two, described air inlet comprises some strip gabs, some strip gabs are arranged in juxtaposition along the Width of strip gab, the length direction of described magnetic stripe and the length direction of strip gab intersect, as preferably, the length direction of described magnetic stripe is vertical with the length direction of strip gab.
Embodiment bis-:
As shown in Figures 3 to 6, the difference of the present embodiment and embodiment mono-is, described magnetic stripe is located in the cooling air channel between air inlet and permanent magnet and away from air inlet setting, described magnetic stripe is located at the rear end of front end or the motor casing of back cover, in the present embodiment, described magnetic stripe is located at the front end of back cover, described back cover is provided with the socket 212 passing for magnetic stripe, in described socket, be provided with radially inside outstanding location-plate 213, the upper end of described magnetic stripe is provided with magnetic stripe support 1, the upper end of described magnetic stripe support one is provided with radially outward outstanding boss 61, described boss is supported on location-plate, realizing magnetic stripe support one coordinates with the location of socket, described magnetic stripe is fixed on magnetic stripe support one and is vertically placed in cooling air channel through socket, in order to strengthen the installation fastness to magnetic stripe, described back cover inside is provided with support 27, described support two is provided with slot 71, the bottom of described magnetic stripe is plugged in slot, two-part demarcation strip 8 before and after the front end of described support two or rear end are provided with casing inside is divided into, described demarcation strip is provided with ventilating opening 81, described magnetic stripe is positioned on ventilating opening.
Embodiment tri-:
As shown in Figure 7, the difference of the present embodiment and embodiment mono-, two is, described air inlet is provided with dust cover 9, described dust cover is metal dust cover or plastic dust cover, described magnetic part is the magnetic stripe being positioned on dust cover, and described magnetic stripe is positioned at rear and front end or upper and lower two ends or the centre of dust cover.
Can be by embodiment mono-and embodiment bis-combinations, at air inlet and the front end of electric tool back cover, magnetic part is all set; Also can be by embodiment bis-and embodiment tri-combinations, at the air inlet of electric tool back cover, dust cover and magnetic part are set, at the front end of electric tool back cover, magnetic part is set.
The cartridge insertion direction of the relative socket of regulation magnetic stripe is above-below direction, magnetic stripe from top to bottom plug-in mounting to casing;
The circulating direction of regulation casing internal cooling wind is fore-and-aft direction, and cooling air flows to front from rear.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.
Claims (9)
1. the electric tool with dust filtration device, comprise casing, described casing comprises motor casing (1) and back cover (2), the rear end of described motor casing is connected with the front end of back cover, in described motor casing, be positioned with stator (31) and rotor (32), described rotor or stator are permanent magnet, described back cover is provided with air inlet (41), between described motor casing and stator and between stator and rotor, there is gap (42), the head of described casing is provided with air outlet (43), described air inlet, gap is communicated with into cooling air channel successively with air outlet, it is characterized in that: in the cooling air channel between described air inlet and permanent magnet, be furnished with magnetic part (5).
2. a kind of electric tool with dust filtration device according to claim 1, is characterized in that: described magnetic part comprises at least one magnetic stripe.
3. a kind of electric tool with dust filtration device according to claim 2, it is characterized in that: described magnetic stripe is located on air inlet, described air inlet comprises some strip gabs, some strip gabs are arranged in juxtaposition along the Width of strip gab, and the length direction of described magnetic stripe and the length direction of strip gab intersect.
4. a kind of electric tool with dust filtration device according to claim 3, it is characterized in that: described back cover comprises back cover one (21) and back cover two (22), the rear end of described motor casing is connected with the front end of back cover one, described back cover one is provided with installing port (211), described back cover two is detachably connected on installing port, described air inlet is located on back cover two, and described magnetic stripe is removably connected and is positioned on air inlet by the inwall with back cover two.
5. according to a kind of electric tool with dust filtration device described in claim 2 or 3 or 4, it is characterized in that: described magnetic stripe is located at the front end of back cover, described back cover is provided with the socket (212) passing for magnetic stripe, the upper end of described magnetic stripe is provided with the magnetic stripe support one (6) coordinating with socket location, and described magnetic stripe is fixed on magnetic stripe support one and is vertically placed in cooling air channel through socket.
6. a kind of electric tool with dust filtration device according to claim 5, is characterized in that: described back cover inside is provided with support two (7), and described support two is provided with the slot (71) of accommodating magnetic stripe bottom.
7. a kind of electric tool with dust filtration device according to claim 6, it is characterized in that: two-part demarcation strip (8) before and after the front end of described support two or rear end are provided with casing inside is divided into, described demarcation strip is provided with ventilating opening (81), and described magnetic stripe is positioned on ventilating opening.
8. a kind of electric tool with dust filtration device according to claim 5, it is characterized in that: the upper end of described magnetic stripe support one is provided with radially outward outstanding boss (61), in described socket, be provided with radially inside outstanding location-plate (213), described boss is supported on location-plate.
9. a kind of electric tool with dust filtration device according to claim 1, is characterized in that: described air inlet is provided with dust cover (9), and described magnetic part is the magnetic stripe being positioned on dust cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035447.8U CN203722381U (en) | 2014-01-21 | 2014-01-21 | Electric tool with dust filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035447.8U CN203722381U (en) | 2014-01-21 | 2014-01-21 | Electric tool with dust filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203722381U true CN203722381U (en) | 2014-07-16 |
Family
ID=51161504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420035447.8U Expired - Lifetime CN203722381U (en) | 2014-01-21 | 2014-01-21 | Electric tool with dust filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203722381U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300757A (en) * | 2014-10-24 | 2015-01-21 | 南车株洲电力机车研究所有限公司 | Permanent magnet synchronous motor |
| CN105762985A (en) * | 2016-05-09 | 2016-07-13 | 浙江博大实业有限公司 | Brushless direct-current electric tool |
| CN111969788A (en) * | 2020-08-26 | 2020-11-20 | 杭州木野机械科技有限公司 | Electric machine |
| CN114393552A (en) * | 2022-01-20 | 2022-04-26 | 浙江皇冠电动工具制造有限公司 | Electric tool with dustproof device and dustproof method |
-
2014
- 2014-01-21 CN CN201420035447.8U patent/CN203722381U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300757A (en) * | 2014-10-24 | 2015-01-21 | 南车株洲电力机车研究所有限公司 | Permanent magnet synchronous motor |
| CN105762985A (en) * | 2016-05-09 | 2016-07-13 | 浙江博大实业有限公司 | Brushless direct-current electric tool |
| CN105762985B (en) * | 2016-05-09 | 2018-06-05 | 浙江博大实业有限公司 | Brushless dc power driven tools |
| CN111969788A (en) * | 2020-08-26 | 2020-11-20 | 杭州木野机械科技有限公司 | Electric machine |
| CN114393552A (en) * | 2022-01-20 | 2022-04-26 | 浙江皇冠电动工具制造有限公司 | Electric tool with dustproof device and dustproof method |
| CN114393552B (en) * | 2022-01-20 | 2023-09-29 | 浙江皇冠电动工具制造有限公司 | Electric tool with dustproof device and dustproof method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |