CN104393733A - Integral high-speed permanent-magnet brushless direct-current motor for electric tool - Google Patents
Integral high-speed permanent-magnet brushless direct-current motor for electric tool Download PDFInfo
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- CN104393733A CN104393733A CN201410727166.3A CN201410727166A CN104393733A CN 104393733 A CN104393733 A CN 104393733A CN 201410727166 A CN201410727166 A CN 201410727166A CN 104393733 A CN104393733 A CN 104393733A
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Abstract
The invention discloses an integral high-speed permanent-magnet brushless direct-current motor for an electric tool, and the motor comprises a rotor and a stator sleeved outside the rotor, wherein front and rear ends of the rotor and stator are respectively provided with a front end cover and a rear end cover, a screw passes through the front end cover and the rear end cover and fits with nuts to integrally assemble the rotor, the stator, the front end cover and the rear end cover, and a fan blade is arranged outside the rear end cover or the front end cover and connected with the rotor to be together rotated. The motor has the advantages of simple process, easy assembly, excellent cooling effect, steady operation and long service life, and a solenoid coil cannot be in short circuit due to being damaged.
Description
Technical field
The present invention relates to a kind of permanent-magnet brushless DC electric machine, particularly relate to a kind of high speed whole permanent magnetic brshless DC motor for electric tool.
Background technology
To have efficiency high due to it for brshless DC motor, the advantages such as noise is low, and the life-span is long, and fail safe is high, environmental protection, has apply very widely in industry and civil area.But in existing technology, the rotating speed of permanent-magnet brushless DC electric machine is general lower, and the brshless DC motor rotation speed requirements of electric tool is high.And the brshless DC motor of electric tool all adopts split-type structural, the location of stator and rotor is all placed in casing, and this Standard trouble, requires that technique is high, expensive.In addition motor is in running up, and the wiping that stator and rotor can occur is touched, as easy as rolling off a log associative perception and the stability affecting electric tool.
Summary of the invention
The object of the invention is to provide a kind of permanent-magnet brushless DC electric machine of monolithic construction.
In order to solve the problems of the technologies described above, technical scheme of the present invention there is provided a kind of high speed whole permanent magnetic brshless DC motor for electric tool, comprise rotor and be set in the stator outside rotor, it is characterized in that, front end housing and rear end cap is respectively equipped with in the rear and front end of rotor and stator, rotor, stator, front end housing and rear end cap are assembled into entirety through attaching nut after front end housing and rear end cap by screw rod, fan blade is positioned at the outside of rear end cap or front end housing, and fan blade is connected to rotor to rotate with rotor.
Preferably, described rotor comprises the armature spindle of rotation, at the middle part of armature spindle, rotor core is housed, many magnets are provided with in rotor core, the front end of every root magnet is exposed to outside the front end face of rotor core, the rear end of every root magnet is concordant with the rear end face of rotor core, magnet fixture and magnet keeper is respectively equipped with in the rear and front end of rotor core, magnet fixture and magnet keeper are set in outside armature spindle, every root magnet front end be exposed to outside rotor core is all located in magnet fixture, and magnet keeper is close to the rear end face of rotor core and the rear end of all magnets.
Preferably, the middle part of described armature spindle has crush rib.
Preferably, described stator comprises the stator core be set in outside described rotor, stator core is wound with multiple solenoid, insulating end plate fixture one and insulating end plate fixture two is respectively equipped with at the two ends of stator core, insulating end plate fixture one is provided with Hall Plate, insulating end plate fixture one and insulating end plate fixture two are formed with extension one and extension two respectively on the end face of stator core, extension one and extension two stretch in stator core, the outer circumference surface of insulating end plate fixture one and insulating end plate fixture two is formed and one to one sheath one and sheath two respectively identical with described screw rod quantity, screw rod described in every root passes respectively from the sheath one corresponding with it and sheath two.
Preferably, the height H of described sheath one and sheath two is 3mm to 5mm; The limit mouth one of described sheath one and sheath two and limit mouth two respectively relatively described insulating end plate fixture one and described insulating end plate fixture two have inclination angle.
Preferably, described front end housing and described rear end cap are provided with the boss one and boss two of locating for described screw rod, are provided with the gathering sill one corresponding with described boss one and described boss 211 and gathering sill two at the inwall of described front end housing and described rear end cap near described boss one and boss two position.
Preferably, the width of described sheath one equals the width of described gathering sill one; The width of described sheath two equals the width of described gathering sill two.
Preferably, described front end housing or described rear end cap are established there are several ventilation hole one and ventilation hole two respectively.
Preferably, rear end cap is provided with several nut boss, and nut boss is provided with nut position, and the width of described nut position equals the width of described nut.
Preferably, described fan blade adopts shaft flow blade, and the diameter of described fan blade is greater than the diameter of described rear end cap.
Preferably, described stator diameter D or be 42mm, or be 47mm, or be 52mm.
The high-speed permanent-magnet brushless direct current machine being applied in electric tool at present all adopts split type, and this requires cabinet axiality and motor process requires higher, is not suitable with domestic production environment.High-speed electric expreess locomotive is made integral type cabinet technology difficulty to be transferred on aluminum component front and rear cover, be easy to reach.On front and rear cover and stator insulation end plate attachment, set up chute coordinate simultaneously, be convenient to motor assembling; Use magnet fixture to save rotor core length, and ensure that Hall element can detect signal; Fan blade is placed on outside motor, fan blade diameter can be expanded; That generates heat due to permanent-magnet brushless DC electric machine in addition only has stator, and external fan blade can cool stator inner side and outer side simultaneously.
Advantage of the present invention is: technique is simple, and easy to assembly, solenoid because of damaged short circuit, can not cool, and stable, the life-span is long.
Accompanying drawing explanation
Fig. 1 is stereogram of the present invention;
Fig. 2 is profile of the present invention;
Fig. 3 is exploded view of the present invention;
Fig. 4 is the stereogram of described stator;
Fig. 5 is the stereogram of described front end housing;
Fig. 6 is the stereogram in described rear end cap front;
Fig. 7 is the stereogram at the described rear end cap back side.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
The installation dimension of a kind of high speed whole permanent magnetic brshless DC motor for electric tool provided by the invention has brushless motor identical with standardized whole permanent magnetic, two kinds of motors have interchangeability, on the basis not changing former electric tool product, the demand of different client can be applicable to, comprise rotor 1 and be set in the stator 2 outside rotor 1, it is characterized in that, front end housing 4 and rear end cap 5 is respectively equipped with in the rear and front end of rotor 1 and stator 2, after screw rod 6 passes front end housing 4 and rear end cap 5, attaching nut 7 is by rotor 1, stator 2, front end housing 4 and rear end cap 5 are assembled into entirety, fan blade 3 is positioned at the outside of rear end cap 5 or front end housing 4, fan blade 3 is connected to rotor 1 to rotate with rotor 1.
Rotor 1 comprises the armature spindle 11 of rotation, the middle part of rotor 1 has crush rib 111, at the middle part of armature spindle 11, rotor core 12 is housed, many magnets 13 are provided with in rotor core 12, the front end of every root magnet 13 is exposed to outside the front end face of rotor core 12, the rear end of every root magnet 13 is concordant with the rear end face of rotor core 12, magnet fixture 14 and magnet keeper 15 is respectively equipped with in the rear and front end of rotor core 12, magnet fixture 14 and magnet keeper 15 are set in outside armature spindle 11, every root magnet 13 front end be exposed to outside rotor core 12 is all located in magnet fixture 14, magnet keeper 15 is close to the rear end face of rotor core 12 and the rear end of all magnets 13, save silicon steel sheet materials, be convenient to the Hall element detection signal in Hall Plate 25.
Stator 2 comprises the stator core 21 be set in outside rotor 1, stator core 21 is wound with multiple solenoid 24, insulating end plate fixture 1 and insulating end plate fixture 2 23 is respectively equipped with at the two ends of stator core 21, insulating end plate fixture 1 is provided with Hall Plate 25, insulating end plate fixture 1 and insulating end plate fixture 2 23 are formed with extension 1 and extension 2 231 respectively on the end face of stator core 21, extension 1 and extension 2 231 stretch in stator core 21, the outer circumference surface of insulating end plate fixture 1 and insulating end plate fixture 2 23 is formed and one to one sheath one 222 and sheath two 232 respectively identical with screw rod 6 quantity, every root screw rod 6 passes respectively from the sheath 1 corresponding with it and sheath 2 232, sheath 1 and sheath 2 232 can prevent solenoid from contacting with screw rod 6, avoid short circuit and puncture.
The height H of sheath 1 and sheath 2 232 is 3mm to 5mm, can be used as the location of Hall Plate 25; The limit mouth 1 of sheath 1 and sheath 2 232 and limit mouth 2 233 respectively opposing insulation end plate attachment 1 and insulating end plate fixture 2 23 have inclination angle, guarantee that stator 2 conveniently can insert front end housing 4 or rear end cap 5; The width of sheath 1 equals the width of gathering sill 1; The width of sheath 2 232 equals the width of gathering sill 2 52, can guarantee that stator 2 radial rotary does not occur with front end housing 4 or rear end cap 5 during assembling motor.
Front end housing 4 and rear end cap 5 are provided with the boss 1 and boss 2 51 of locating for screw rod 6, are provided with and boss 1 and boss 2 51 gathering sill 1 and gathering sill 2 52 one to one near boss 1 and boss 2 51 position at the inwall of front end housing 4 and rear end cap 5.
Front end housing 4 or rear end cap 5 are established and has several ventilation hole 1 and ventilation hole 2 53 respectively.
Rear end cap 5 is provided with several nut boss 54, and nut boss is provided with nut position 55, and the width of described nut position equals the width of described nut 7.
Fan blade 3 adopts shaft flow blade, and the diameter of fan blade 3 is greater than the diameter of rear end cap 5.
Stator 2 diameter D or be 42mm is identical with No. 700 standard permanent-magnet DC brush motor external diameters; Or be 47mm, identical with No. 800 standard permanent-magnet DC brush motor external diameters; Or be 52mm, identical with No. 900 standard permanent-magnet DC brush motor external diameters.
Claims (10)
1. the high speed whole permanent magnetic brshless DC motor for electric tool, comprise rotor (1) and be set in rotor (1) stator outward (2), it is characterized in that, front end housing (4) and rear end cap (5) is respectively equipped with in the rear and front end of rotor (1) and stator (2), screw rod (6) through front end housing (4) and rear end cap (5) afterwards attaching nut (7) by rotor (1), stator (2), front end housing (4) and rear end cap (5) are assembled into entirety, fan blade (3) is positioned at the outside of rear end cap (5) or front end housing (4), fan blade (3) is connected to rotor (1) to rotate with rotor (1).
2. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 1, it is characterized in that, described rotor (1) comprises the armature spindle (11) of rotation, at the middle part of armature spindle (11), rotor core (12) is housed, many magnets (13) are provided with in rotor core (12), the front end of every root magnet (13) is exposed to outside the front end face of rotor core (12), the rear end of every root magnet (13) is concordant with the rear end face of rotor core (12), magnet fixture (14) and magnet keeper (15) is respectively equipped with in the rear and front end of rotor core (12), magnet fixture (14) and magnet keeper (15) are set in armature spindle (11) outward, every root magnet (13) is exposed to rotor core (12) front end outward and is all located in magnet fixture (14), magnet keeper (15) is close to the rear end face of rotor core (12) and the rear end of all magnets (13).
3. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 2, it is characterized in that, the middle part of described armature spindle (11) has crush rib (111).
4. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 1, it is characterized in that, described stator (2) comprises and is set in described rotor (1) stator core outward (21), stator core (21) is wound with multiple solenoid (24), insulating end plate fixture one (22) and insulating end plate fixture two (23) is respectively equipped with at the two ends of stator core (21), insulating end plate fixture one (22) is provided with Hall Plate (25), insulating end plate fixture one (22) and insulating end plate fixture two (23) are formed with extension one (221) and extension two (231) respectively on the end face of stator core (21), extension one (221) and extension two (231) stretch in stator core (21), the outer circumference surface of insulating end plate fixture one (22) and insulating end plate fixture two (23) is formed and one to one sheath one (222) and sheath two (232) respectively identical with described screw rod (6) quantity, screw rod (6) described in every root passes respectively from the sheath one (222) corresponding with it and sheath two (232).
5. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 4, it is characterized in that, the height H of described sheath one (222) and sheath two (232) is 3mm to 5mm; The limit mouth one (223) of described sheath one (222) and sheath two (232) and limit mouth two (233) respectively relatively described insulating end plate fixture one (22) and described insulating end plate fixture two (23) have inclination angle.
6. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 4, it is characterized in that, described front end housing (4) and described rear end cap (5) are provided with the boss one (41) and boss two (51) of locating for described screw rod (6), be provided with and described boss one (41) and described boss two (51) gathering sill one (42) and gathering sill two (52) one to one near described boss one (41) and boss two (51) position at the inwall of described front end housing (4) and described rear end cap (5).
7. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 6, it is characterized in that, the width of described sheath one (222) equals the width of described gathering sill one (42); The width of described sheath two (232) equals the width of described gathering sill two (52).
8. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 6, it is characterized in that, described front end housing (4) or described rear end cap (5) are established several ventilation hole one (43) and ventilation hole two (53) respectively; Described rear end cap (5) is provided with several nut boss (54), and nut boss is provided with nut position (55), and the width of described nut position equals the width of described nut (7).
9. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 1, it is characterized in that, described fan blade (3) adopts shaft flow blade, and the diameter of described fan blade (3) is greater than the diameter of described rear end cap (5).
10. a kind of high speed whole permanent magnetic brshless DC motor for electric tool as claimed in claim 1, is characterized in that, described stator (2) diameter D or be 42mm, or is 47mm, or is 52mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727166.3A CN104393733B (en) | 2014-12-03 | 2014-12-03 | Integral high-speed permanent-magnet brushless direct-current motor for electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727166.3A CN104393733B (en) | 2014-12-03 | 2014-12-03 | Integral high-speed permanent-magnet brushless direct-current motor for electric tool |
Publications (2)
| Publication Number | Publication Date |
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| CN104393733A true CN104393733A (en) | 2015-03-04 |
| CN104393733B CN104393733B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410727166.3A Active CN104393733B (en) | 2014-12-03 | 2014-12-03 | Integral high-speed permanent-magnet brushless direct-current motor for electric tool |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016192003A1 (en) * | 2015-06-01 | 2016-12-08 | Ac (Macao Commercial Offshore) Limited | Brushless can motor |
| CN106685172A (en) * | 2017-02-10 | 2017-05-17 | 浙江大东吴汽车电机有限公司 | Three-phase permanent magnet external rotor motor and method for assembling stator and rotor |
| CN109227479A (en) * | 2018-11-16 | 2019-01-18 | 上海电动工具研究所（集团）有限公司 | A kind of hand-held brushless direct-current electric hammer |
| CN113141074A (en) * | 2021-04-09 | 2021-07-20 | 浙江零跑科技有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
| WO2021244407A1 (en) * | 2020-06-04 | 2021-12-09 | 南京德朔实业有限公司 | Electric motor and electric tool |
| CN116799991A (en) * | 2023-08-14 | 2023-09-22 | 江苏东成工具科技有限公司 | Outer rotor motor |
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| CN1725609A (en) * | 2005-06-28 | 2006-01-25 | 任奕彪 | Permanent magnet brushless DC motor |
| CN102468733A (en) * | 2010-11-15 | 2012-05-23 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN202513802U (en) * | 2012-04-10 | 2012-10-31 | 周拥军 | Inner rotor motor |
| CN203674947U (en) * | 2013-11-25 | 2014-06-25 | 东莞市瑞科五金塑胶制品有限公司 | Minitype brushless direct current motor |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1725609A (en) * | 2005-06-28 | 2006-01-25 | 任奕彪 | Permanent magnet brushless DC motor |
| CN102468733A (en) * | 2010-11-15 | 2012-05-23 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN202513802U (en) * | 2012-04-10 | 2012-10-31 | 周拥军 | Inner rotor motor |
| CN203674947U (en) * | 2013-11-25 | 2014-06-25 | 东莞市瑞科五金塑胶制品有限公司 | Minitype brushless direct current motor |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016192003A1 (en) * | 2015-06-01 | 2016-12-08 | Ac (Macao Commercial Offshore) Limited | Brushless can motor |
| CN107615628A (en) * | 2015-06-01 | 2018-01-19 | 创科（澳门离岸商业服务）有限公司 | Brushless tank shape motor |
| US20180152062A1 (en) * | 2015-06-01 | 2018-05-31 | Tti (Macao Commercial Offshore) Limited | Brushless can motor |
| EP3304707A4 (en) * | 2015-06-01 | 2019-01-09 | TTI (Macao Commercial Offshore) Limited | Brushless can motor |
| US10601266B2 (en) | 2015-06-01 | 2020-03-24 | Tti (Macao Commercial Offshore) Limited | Brushless can motor |
| AU2019203762B2 (en) * | 2015-06-01 | 2021-01-28 | Techtronic Power Tools Technology Limited | Brushless can motor |
| CN106685172A (en) * | 2017-02-10 | 2017-05-17 | 浙江大东吴汽车电机有限公司 | Three-phase permanent magnet external rotor motor and method for assembling stator and rotor |
| CN109227479A (en) * | 2018-11-16 | 2019-01-18 | 上海电动工具研究所（集团）有限公司 | A kind of hand-held brushless direct-current electric hammer |
| WO2021244407A1 (en) * | 2020-06-04 | 2021-12-09 | 南京德朔实业有限公司 | Electric motor and electric tool |
| CN113141074A (en) * | 2021-04-09 | 2021-07-20 | 浙江零跑科技有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
| CN116799991A (en) * | 2023-08-14 | 2023-09-22 | 江苏东成工具科技有限公司 | Outer rotor motor |
| CN116799991B (en) * | 2023-08-14 | 2024-01-02 | 江苏东成工具科技有限公司 | Outer rotor motor |
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| CN104393733B (en) | 2017-01-11 |
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