CN204597752U - Hand-hold type frequency conversion type brushless electric tool - Google Patents
Hand-hold type frequency conversion type brushless electric tool Download PDFInfo
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- CN204597752U CN204597752U CN201520369964.3U CN201520369964U CN204597752U CN 204597752 U CN204597752 U CN 204597752U CN 201520369964 U CN201520369964 U CN 201520369964U CN 204597752 U CN204597752 U CN 204597752U
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Abstract
The utility model discloses a kind of hand-hold type frequency conversion type brushless electric tool, comprise switch assembly (19), brshless DC motor, housing (12), head capsule (9), protecgulum (5), power take-off mechanism, described brshless DC motor comprises front motor cover (10), motor cylindrical shell (11), motor rear cover (16), stator (13), rotor (14), machine shaft (15), rotor (14) is fixed on machine shaft (15), stator (13) and rotor (14) are arranged in the enclosed construction that front motor cover (10) and motor rear cover (16) and motor cylindrical shell (11) form, cooling air channel (20) is provided with between motor cylindrical shell (11) and housing (12), machine shaft (15) rear end is provided with rear-mounted fan (17), housing (12) is provided with the ventilating window (18) communicated with cooling air channel (20), and head capsule (9) is provided with the multiple air outlets communicated with cooling air channel (20).The feature such as after adopting this said structure, have that simple and reasonable, air quantity is large, motor seal and good heat dissipation effect, energy-conserving and environment-protective, use safety, life-span are long.
Description
Technical field
The utility model relates to a kind of hand held electric tool, particularly a kind of hand-hold type frequency conversion type brushless electric tool by Frequency Converter Control brshless DC motor outputting power.
Background technology
The hand held electric tool of current use adopts single phase series motivated motor substantially, and its advantage is that rotating speed is high, moment of torsion is large, socket power is convenient, carry light and handy, use safety; Its shortcoming existed is because series excited machine has commutator, carbon brush, motor manufacture difficulty is strengthened, and the spark produced when commutator and carbon brush friction during motor rotation with carbon dust accumulation directly can affect life-span of motor, unloaded noise is large, produce Radio and television interferences, need the brush often changing wearing and tearing, a large amount of carbon dust dust is had to overflow, start and stalling current large, affect the normal use of other electrical equipment in electrical network, along with increasing speed of load can sharply decline during use, work efficiency drop motor rotation blockage is caused even to burn machine.
In order to effectively solve the problems referred to above that hand held electric tool single phase series motivated motor exists, Chinese patent discloses a kind of frequency conversion electric tool and a kind of double insulation frequency conversion brushless electric tool, effective frequency conversion control technique and brshless DC motor are applied in electric tool, make the advantages such as electric tool has energy-saving and environmental protection, use safety, convenience, efficiency is high, the life-span is long.But in use there is following problem, due to electric tool work under bad environment, various dust, impurity are easy to enter in brshless DC motor, after particularly iron end, iron are cut and entered motor, be just adsorbed on the surface of p-m rotor, after stockpiling for a long time, iron end, iron are cut and the space between rotor can be filled up, cause rotor turns difficulty, cause motor damage or burn, even scrapping.For this reason, many manufacturers and knowledgeable people develop specially and develop, but not yet have comparatively ideal product to emerge so far.
Summary of the invention
For overcoming the problems referred to above that existing frequency conversion electric tool exists, the purpose of this utility model is to provide a kind of simple and reasonable, air quantity is large, wind speed is fast, motor seal and good heat dissipation effect, energy-conserving and environment-protective, use safety, life-span are grown hand-hold type frequency conversion type brushless electric tool.
The utility model solves the technical scheme that its technical problem adopts, it comprises switch assembly, brshless DC motor, housing, head capsule, protecgulum, power take-off mechanism, described brshless DC motor comprises front motor cover, motor cylindrical shell, motor rear cover, stator, rotor, machine shaft, rotor is fixed on machine shaft, stators and rotators is arranged in the enclosed construction that front motor cover and motor rear cover and motor cylindrical shell form, cooling air channel is provided with between motor cylindrical shell and housing, machine shaft rear end is provided with rear-mounted fan, the housing corresponding with rear-mounted fan is provided with the ventilating window communicated with cooling air channel, the front portion of housing or head capsule are provided with the multiple air outlets communicated with cooling air channel.
Further scheme of the present utility model, described machine shaft rear end is arranged on motor rear cover rotationally by bearing, and machine shaft front end is arranged on head capsule rotationally by bearing.
Further scheme of the present utility model, described head capsule is provided with the upper air outlet and lower air outlet that communicate with cooling air channel.
Further scheme of the present utility model, described power take-off mechanism comprises bevel pinion, output shaft and bevel gear wheel, and output shaft is arranged on head capsule and protecgulum rotationally, and bevel pinion is fixed on machine shaft, bevel gear wheel is fixed on output shaft, and bevel gear wheel engages with bevel pinion.
Further scheme of the present utility model, described output shaft stretches out protecgulum and is fixed with grinding wheel by top board and lower platen.
Further scheme of the present utility model, described protecgulum is fixed with the protective hood of grinding wheel coordinated with grinding wheel.
Adopt after said structure, have the following advantages compared with the prior art and effect: one be efficiently solve adopt single phase series motivated motor noise large, produce Radio and television interferences, wear of brush, starting and stalling current is large, the life-span is short problem.Two is because stators and rotators is arranged in the enclosed construction that front motor cover and motor rear cover and motor cylindrical shell form, be provided with cooling air channel between motor cylindrical shell and housing, efficiently solve iron end and iron cut be adsorbed on p-m rotor surface on cause the problem of motor damage and cooling effect of motor difference.Three is due to brshless DC motor good seal performance, can normal work in adverse circumstances.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is perspective view of the present utility model.
Wherein 1 grinding wheel, 2 top boards, 3 lower platens, 4 protective hood of grinding wheel, 5 protecgulums, 6 bevel gear wheels, 7 output shafts, 8 bevel pinions, 9 head capsules, 10 front motor covers, 11 motor cylindrical shells, 12 housings, 13 stators, 14 rotors, 15 machine shafts, 16 motor rear covers, 17 fans, 18 ventilating windows, 19 switch assemblies, 20 cooling air channels, air outlet on 21,22 times air outlets.
Embodiment
Shown in Fig. 1 and Fig. 2, for the specific embodiments of a kind of hand-hold type frequency conversion type of the utility model brushless electric tool, it comprises external frequency converter, switch assembly 19, brshless DC motor, housing 12, head capsule 9, protecgulum 5, power take-off mechanism, described brshless DC motor comprises front motor cover 10, motor cylindrical shell 11, motor rear cover 16, stator 13, rotor 14, machine shaft 15, rotor 14 is fixed on machine shaft 15, stator 13 and rotor 14 are arranged in the enclosed construction that front motor cover 10 and motor rear cover 16 and motor cylindrical shell 11 form, can effectively prevent iron end and iron from cutting is adsorbed on rotor 14, can normally work in the presence of a harsh environment, cooling air channel 20 is provided with between motor cylindrical shell 11 and housing 12, machine shaft 15 rear end is provided with rear-mounted fan 17, the housing 12 corresponding with rear-mounted fan 17 is provided with the ventilating window 18 communicated with cooling air channel 20, the front portion of housing 12 or head capsule 9 are provided with the multiple air outlets communicated with cooling air channel 20.Described head capsule 9 is provided with the upper air outlet 21 and lower air outlet 22 that communicate with cooling air channel 20, and during work, air quantity is large, motor radiating good cooling results.For the ease of heat radiation, the most handy aluminum material of motor cylindrical shell 11 is made.
In order to ensure that machine operation is reliable and stable, described machine shaft 15 rear end is arranged on motor rear cover 16 by bearing rotationally, and machine shaft 15 front end is arranged on head capsule 9 rotationally by bearing.
Described power take-off mechanism comprises bevel pinion 8, output shaft 7 and bevel gear wheel 6, output shaft 7 is arranged on head capsule 9 and protecgulum 5 rotationally, bevel pinion 8 is fixed on machine shaft 15, and bevel gear wheel 6 is fixed on output shaft 7, and bevel gear wheel 6 engages with bevel pinion 8.Described output shaft 7 stretches out protecgulum 5 and is fixed with grinding wheel 1 by top board 2 and lower platen 3.Described protecgulum 5 is fixed with the protective hood of grinding wheel 4 coordinated with grinding wheel 1.
The above; just specific embodiment of the utility model, not makes any pro forma restriction to the utility model, is not departing from the technical solution of the utility model basis; done simple modification, equivalent variations or modification, all fall into protection range of the present utility model.
Claims (6)
1. a hand-hold type frequency conversion type brushless electric tool, comprise switch assembly (19), brshless DC motor, housing (12), head capsule (9), protecgulum (5), power take-off mechanism, it is characterized in that: described brshless DC motor comprises front motor cover (10), motor cylindrical shell (11), motor rear cover (16), stator (13), rotor (14), machine shaft (15), rotor (14) is fixed on machine shaft (15), stator (13) and rotor (14) are arranged in the enclosed construction that front motor cover (10) and motor rear cover (16) and motor cylindrical shell (11) form, cooling air channel (20) is provided with between motor cylindrical shell (11) and housing (12), machine shaft (15) rear end is provided with rear-mounted fan (17), the housing (12) corresponding with rear-mounted fan (17) is provided with the ventilating window (18) communicated with cooling air channel (20), the front portion of housing (12) or head capsule (9) are provided with the multiple air outlets communicated with cooling air channel (20).
2. hand-hold type frequency conversion type brushless electric tool according to claim 1, it is characterized in that: described machine shaft (15) rear end is arranged on motor rear cover (16) by bearing rotationally, and machine shaft (15) front end is arranged on head capsule (9) rotationally by bearing.
3. hand-hold type frequency conversion type brushless electric tool according to claim 1 and 2, is characterized in that: described head capsule (9) is provided with the upper air outlet (21) and lower air outlet (22) that communicate with cooling air channel (20).
4. hand-hold type frequency conversion type brushless electric tool according to claim 3, it is characterized in that: described power take-off mechanism comprises bevel pinion (8), output shaft (7) and bevel gear wheel (6), output shaft (7) is arranged on head capsule (9) and protecgulum (5) rotationally, bevel pinion (8) is fixed on machine shaft (15), bevel gear wheel (6) is fixed on output shaft (7), and bevel gear wheel (6) engages with bevel pinion (8).
5. hand-hold type frequency conversion type brushless electric tool according to claim 4, is characterized in that: described output shaft (7) stretches out protecgulum (5) and is fixed with grinding wheel (1) by top board (2) and lower platen (3).
6. hand-hold type frequency conversion type brushless electric tool according to claim 5, is characterized in that: described protecgulum (5) is fixed with the protective hood of grinding wheel (4) coordinated with grinding wheel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369964.3U CN204597752U (en) | 2015-06-02 | 2015-06-02 | Hand-hold type frequency conversion type brushless electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369964.3U CN204597752U (en) | 2015-06-02 | 2015-06-02 | Hand-hold type frequency conversion type brushless electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204597752U true CN204597752U (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520369964.3U Active CN204597752U (en) | 2015-06-02 | 2015-06-02 | Hand-hold type frequency conversion type brushless electric tool |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207411A (en) * | 2015-10-23 | 2015-12-30 | 上海电动工具研究所 | Interchange structure for different motors on same casing |
| CN107042492A (en) * | 2016-02-04 | 2017-08-15 | 苏州宝时得电动工具有限公司 | Power tool system and its Motor Rotating Speed Control System |
| CN107914206A (en) * | 2016-10-09 | 2018-04-17 | 苏州宝时得电动工具有限公司 | Brushless angle grinder |
| CN108000307A (en) * | 2016-11-02 | 2018-05-08 | 株式会社牧田 | Electric tool |
| WO2021000940A1 (en) * | 2019-07-04 | 2021-01-07 | 苏州宝时得电动工具有限公司 | Handheld tool |
| WO2022104935A1 (en) * | 2020-11-20 | 2022-05-27 | 江苏铁锚工具有限公司 | Split-type alternating current/direct current brushless tool |
-
2015
- 2015-06-02 CN CN201520369964.3U patent/CN204597752U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207411A (en) * | 2015-10-23 | 2015-12-30 | 上海电动工具研究所 | Interchange structure for different motors on same casing |
| CN107042492A (en) * | 2016-02-04 | 2017-08-15 | 苏州宝时得电动工具有限公司 | Power tool system and its Motor Rotating Speed Control System |
| CN107914206A (en) * | 2016-10-09 | 2018-04-17 | 苏州宝时得电动工具有限公司 | Brushless angle grinder |
| CN108000307A (en) * | 2016-11-02 | 2018-05-08 | 株式会社牧田 | Electric tool |
| WO2021000940A1 (en) * | 2019-07-04 | 2021-01-07 | 苏州宝时得电动工具有限公司 | Handheld tool |
| WO2022104935A1 (en) * | 2020-11-20 | 2022-05-27 | 江苏铁锚工具有限公司 | Split-type alternating current/direct current brushless tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 558, the Great Wall East Avenue, the Great Wall Economic Development Zone, Jinhua, Zhejiang Patentee after: Polytron Technologies Inc in Zhengyang Address before: 321300 Zhengyang Industrial Investment Co., Ltd., the Great Wall East Avenue, Yongkang, Zhejiang, China, Jinhua Province, No. 558 Patentee before: Yongkang Zhengda Industrial Co., Ltd. |
|
| CP03 | Change of name, title or address |